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chromium/devtools/devtools-frontend.git/HEAD/./third_party/blink/renderer/platform/runtime_enabled_features.json5
blob: c525830784a33b3a5a6877f65e64d0f1c0e373a4 [file]
{
// See third_party/blink/renderer/platform/RuntimeEnabledFeatures.md
//
// This list is used to generate runtime_enabled_features.h/cc which contains
// a class that stores static enablers for all experimental features.
parameters: {
// Each feature can be assigned a "status". The "status" can be either
// one of the values in the |valid_values| list or a dictionary of
// the platforms listed in |valid_keys| to |valid_values|.
// Use "default" as the key if you want to specify the status of
// the platforms other than the ones declared in the dictionary.
// ** Omitting "default" means the feature is not enabled on
// the platforms not listed in the status dictionary
//
// Definition of each status:
// * status=stable: Enable this in all Blink configurations. We are
// committed to these APIs indefinitely.
// * status=experimental: In-progress features, Web Developers might play
// with, but are not on by default in stable. These features may be
// turned on using the "Experimental Web Platform features" flag in
// chrome://flags/#enable-experimental-web-platform-features.
// * status=test: Enabled in ContentShell for testing, otherwise off.
// Features without a status are not enabled anywhere by default.
//
// Example of the dictionary value use:
// {
// name: "ExampleFeature",
// status: {"Android": "stable", "Win": "experimental"},
// }
// "ExampleFeature" will be stable on Android/WebView, experimental
// on Windows and not enabled on any other platform.
//
// Note that the Android status key implies Chrome for Android and WebView.
//
// "stable" features listed here should be rare, as anything which we've
// shipped stable can have its runtime flag removed soon after.
status: {
valid_values: ["stable", "experimental", "test"],
valid_keys: ["Android", "Win", "ChromeOS", "Mac", "Linux", "iOS", "Fuchsia"]
},
// "implied_by" or "depends_on" specifies relationship to other features:
// * implied_by: ["feature1","feature2",...]
// The feature is automatically enabled if any implied_by features is
// enabled. To effectively disable the feature, you must disable the
// feature and all the implied_by features.
// * depends_on: ["feature1","feature2",...]
// The feature can be enabled only if all depends_on features are enabled.
// Only one of "implied_by" and "depends_on" can be specified.
implied_by: {
default: [],
valid_type: "list",
},
// *DO NOT* specify features that depend on origin trial features.
// It is NOT supported. As a workaround, you can either specify the same
// |origin_trial_feature_name| for the feature or add the OT feature to
// the |implied_by| list.
// TODO(https://crbug.com/954679): Add support for origin trial features in 'depends_on' list
depends_on: {
default: [],
valid_type: "list",
},
// origin_trial_feature_name: "FEATURE_NAME" is used to integrate the
// feature with the Origin Trials framework. The framework allows the
// feature to be enabled at runtime on a per-page basis through a signed
// token for the corresponding feature name. Declaring the
// origin_trial_feature_name will modify the generation of the static
// methods in runtime_enabled_features.h/cpp -- the no-parameter version
// will not be generated, so all callers have to use the version that takes
// a const FeatureContext* argument.
origin_trial_feature_name: {
},
// origin_trial_os specifies the platforms where the trial is available.
// The default is empty, meaning all platforms.
origin_trial_os: {
default: [],
valid_type: "list",
},
// origin_trial_type specifies the unique type of the trial, when not the
// usual trial for a new experimental feature.
origin_trial_type: {
default: "",
valid_type: "str",
valid_values: ["deprecation", "intervention", ""],
},
// origin_trial_allows_insecure specifies whether the trial can be enabled
// in an insecure context, with default being false. This can only be set
// to true for a "deprecation" type trial.
origin_trial_allows_insecure: {
valid_type: "bool",
},
// origin_trial_allows_third_party specifies whether the trial can be enabled
// from third party origins, with default being false.
origin_trial_allows_third_party: {
valid_type: "bool",
},
// settable_from_internals specifies whether a feature can be set from
// internals.runtimeFlags, with the default being false.
settable_from_internals: {
valid_type: "bool",
},
// public specifies whether a feature can be accessed via
// third_party/blink/public/platform/web_runtime_features.h with dedicated
// methods. The default is false. This should be rare because
// WebRuntimeFeatures::EnableFeatureFromString() works in most cases.
public: {
valid_type: "bool",
},
// Feature policy IDL extended attribute (see crrev.com/2247923004).
feature_policy: {
},
// The string name of a base::Feature. The C++ variable name in
// blink::features is built with this string by prepending 'k'.
// As long as this field isn't "none", a base::Feature is automatically
// generated in features_generated.{h,cc}. By default the "name" field
// is used for the feature name, but can be overridden here.
//
// The default value of the base::Feature instance is:
// base::FEATURE_ENABLED_BY_DEFAULT if 'status' field is 'stable", and
// base::FEATURE_DISABLED_BY_DEFAULT otherwise.
// It can be overridden by 'base_feature_status' field.
//
// If the flag should be associated with a feature not in blink::features,
// we need to specify `base_feature: "none"` and map the features in
// content/child/runtime_features.cc. `base_feature: "none"` is strongly
// discouraged if the feature doesn't have an associated base feature
// because the feature would lack a killswitch controllable via finch.
base_feature: {
valid_type: "str",
default: "",
},
// Specify the default value of the base::Feature instance. This field
// works only if base_feature is not "none".
// If the field is missing or "", the default value depends on the 'status'
// field. See the comment above.
// "disabled" sets base::FEATURE_DISABLED_BY_DEFAULT, and "enabled" sets
// base::FEATURE_ENABLED_BY_DEFAULT.
base_feature_status: {
valid_type: "str",
valid_values: ["", "disabled", "enabled"],
default: "",
},
// Specify how the flag value is updated from the base::Feature value. This
// field works only if base_feature is not "none".
//
// * "enabled_or_overridden"
// - If the base::Feature status is overridden to the enabled or disabled
// state by field trial or command line, set Blink feature to the state
// of the base::Feature. Note: "Override to Default" doesn't affect the
// Blink feature.
// - Otherwise if the base::Feature is enabled, enable the Blink feature.
// - Otherwise no change.
//
// * "overridden"
// Enables the Blink feature when the base::Feature status is overridden
// to the enabled or disabled state by field trial or command line.
// Otherwise no change. Its difference from "enabled_or_overridden" is
// that the Blink feature isn't affected by the default state of the
// base::Feature. Note: "Override to Default" deosn't affect the Blink
// feature.
//
// This is useful for Blink origin trial features especially those
// implemented in both Chromium and Blink. As origin trial only controls
// the Blink features, we require the base::Feature to be enabled
// by default, but we don't want the default enabled status to affect the
// Blink feature. See RuntimeEnabledFeatures.md for a detailed explanation
// of how this works. See also https://crbug.com/1048656#c10.
// This can also be used for features that are enabled by default in
// Chromium but not in Blink on all platforms and we want to use the Blink
// status. However, we would prefer consistent Chromium and Blink status
// to this.
copied_from_base_feature_if: {
valid_type: "str",
valid_values: ["enabled_or_overridden", "overridden"],
default: "enabled_or_overridden",
},
// browser_process_read_access indicates the runtime feature state should be
// readable in the browserprocess via RuntimeFeatureStateReadContext.
// TODO(crbug.com/1377000): this feature does not support origin trial
// tokens provided in HTTP headers. Any tokens provided via HTTP header will
// be dropped. Please inform developers they must embed the token in HTML.
browser_process_read_access: {
default: false,
value_type: "bool",
},
// browser_process_read_write_access indicates the runtime feature state
// should be writable in the browserprocess via RuntimeFeatureStateContext.
// TODO(crbug.com/1377000): this feature does not support origin trial
// tokens provided in HTTP headers. Any tokens provided via HTTP header will
// be dropped. Please inform developers they must embed the token in HTML.
browser_process_read_write_access: {
default: false,
value_type: "bool",
},
// `custom_enable_check` declares a method on `RuntimeEnabledFeaturesBase`;
// authors must provide a corresponding definition of the method in
// runtime_enabled_feature_checks.cc. Typically used to guard powerful or
// security-sensitive features; failing the check may, but is not required,
// be fatal.
//
// Some caveats:
// Whatever state a check consults is outside the standard feature flags
// that RuntimeEnabledFeatures::Backup saves and restores, so a guarded
// feature should also typically provide a scoper for tests that need to
// manipulate it.
//
// This option is mutually exclusive with:
// - `browser_process_read_access`
// - `browser_process_read_write_access`
// - `origin_trial_feature_name`
// - `public`
// - `settable_from_internals`
// as these provide a way of reading or writing the feature state that would
// likely bypass the coordination required with a custom enable check.
//
// It is also mutually exclusive with:
// - `depends_on`
// - `implied_by`
// as these make the feature depend on the state of other features.
custom_enable_check: {
default: "",
valid_type: "str",
}
},
data: [
{
// This flag changes about:blank to dark in dark mode on user action.
name: "AboutBlankPageRespectsDarkModeOnUserAction",
status: "stable",
},
{
name: "Accelerated2dCanvas",
settable_from_internals: true,
status: "stable",
},
{
name: "AcceleratedSmallCanvases",
status: "stable",
},
{
// crbug.com/409809747
name: "AccessibilityCheckIfcInPreviousTextOnLine",
status: "stable",
},
{
name: "AccessibilityCustomElementRoleNone",
public: true,
status: "test",
base_feature: "none",
},
{
name: "AccessibilityExposeDisplayNone",
status: "test",
},
{
// If the author did not define aria-actions, surface button and link
// children inside option and menuitem elements as implicit actions.
name: "AccessibilityImplicitActions",
status: "experimental",
},
{
// Use a minimum role of group on elements that are keyboard-focusable.
// See https://w3c.github.io/html-aam/#minimum-role.
name: "AccessibilityMinRoleTabbable",
},
{
name: "AccessibilityOSLevelBoldText",
status: "experimental",
public: true,
},
{
// Enforce no accessible name on objects that have a role where names are
// prohibited (listed in https://w3c.github.io/aria/#namefromprohibited):
// log a friendly error in the developer console, and trigger a DCHECK().
// The incorrect markup situation will be repaired, and the name will
// be exposed as a description instead.
// TODO(crbug.com/350528330,
// https://github.com/web-platform-tests/interop-accessibility/issues/133,
// https://github.com/w3c/accname/issues/240,
// https://github.com/w3c/accname/issues/241): If community feedback is
// positive, and WPT + accname testable statements are updated to allow
// this, then add status: test.
name: "AccessibilityProhibitedNames",
},
{
name: "AccessibilitySerializationSizeMetrics",
status: "experimental",
},
{
name: "AccessibilityUseAXPositionForDocumentMarkers",
base_feature: "none",
public: true,
},
{
// https://chromestatus.com/feature/5113389252739072
// https://issues.chromium.org/issues/41119923
name: "AccessKeyLabel",
status: "experimental",
},
{
name: "AddressSpace",
status: "experimental",
implied_by: ["CorsRFC1918"],
},
{
// Interest Group JS API/runtimeflag.
name: "AdInterestGroupAPI",
origin_trial_feature_name: "AdInterestGroupAPI",
implied_by: ["Fledge", "Parakeet"],
public: true,
},
// Adjust the end of the next paragraph if the end position for the
// paragraph is updated while moving the paragraph. See
// https://crbug.com/329121649
{
name: "AdjustEndOfNextParagraphIfMovedParagraphIsUpdated",
status: "stable",
},
{
name: "AdTagging",
public: true,
status: "test",
base_feature: "none",
},
{
name: "AIDecisionModelAPI",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
},
{
name: "AIDecisionModelAPIForWorkers",
status: "test",
},
{
name: "AIEmbeddingsAPI",
status: "test",
},
{
name: "AIEmbeddingsAPIForWorkers",
status: "test",
},
// Strip actionability from content that is positioned offscreen
// via position:fixed and cannot be reached by scrolling.
{
name: "AIPageContentAnchoredFixedOffscreenNonActionability",
status: "stable",
},
// Strip actionability from content that is positioned offscreen via
// absolute/relative/static positioning and cannot be reached by scrolling.
{
name: "AIPageContentAnchoredNonFixedOffscreenNonActionability",
status: "stable",
},
// Whether to automatically build an APC content_extraction tree on load.
{
name: "AIPageContentBuildOnLoadForTesting",
},
// Whether to enforce geometry invariants in AIPageContentAgent.
// Only supported for DCHECK-enabled builds.
{
name: "AIPageContentCheckGeometry",
status: "test"
},
// Ensures that text content extracted from DOM nodes are valid UTF-8 Before
// providing them to consumers of AIPageContent.
{
name: "AIPageContentConvertNodeTextToUtf8",
status: "stable"
},
// When enabled, redact elements with --webkit-text-security.
{
name: "AIPageContentElementCSSRedaction",
status: "stable",
},
{
name: "AIPageContentIncludeSVGSubtree",
status: "stable"
},
// Add label sources in actionable APC.
{
name: "AIPageContentLabelExpandFallbackSources",
status: "stable",
},
// Remove labels that duplicate extracted text in any node in its subtree
// or its image caption. Remove SVG root text when extracted child nodes
// already contain it.
{
name: "AIPageContentLabelRemoveRedundant",
},
// Match labels to whole words or phrases in extracted text in any node in
// its subtree or its image caption, ignoring case. For example:
// - "Password" matches "Enter your password".
// - "lock" does not match "unlock".
// Exact matching still occurs when this is disabled, provided
// AIPageContentLabelRemoveRedundant is enabled.
{
name: "AIPageContentLabelRemoveRedundantWholeWordMatching",
depends_on: ["AIPageContentLabelRemoveRedundant"],
},
// Use MapToVisualRectInAncestorSpace for outer bounding boxes, for
// math consistent with visual bounding boxes.
{
name: "AIPageContentOuterBoxMapToAncestorSpace",
status: "stable",
},
{
name: "AIPageContentPaidContentAnnotation",
status: "stable"
},
// Let fixed wrappers with pointer-events: none use normal APC container
// skipping instead of preserving them automatically.
{
name: "AIPageContentSkipUnclickableFixedOverlays",
status: "stable",
},
// When enabled, iframe element coordinates will be tracked using the
// Element::SetTrackedElementSubRect() method.
{
name: "AIPageContentTrackedElementsIframe",
status: "stable"
},
// When enabled, native or heuristics password element coordinates will be
// tracked using the Element::SetTrackedElementSubRect() method.
{
name: "AIPageContentTrackedElementsPassword",
status: "stable"
},
// Clamp AIPageContent visible bounding boxes to the local-root viewport
// after visual-viewport mapping to normalize viewport-relative geometry.
{
name: "AIPageContentVisualViewportClamp",
status: "stable",
implied_by: ["AIPageContentBuildOnLoadForTesting"],
},
{
name: "AIPromptAPI",
public: true,
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
"default": "",
},
},
{
name: "AIPromptAPIForWorkers",
public: true,
},
{
// Gates access to legacy aliases of renamed "AIPromptAPI" identifiers.
// TODO(crbug.com/498228550): Remove after extension context usage drops.
name: "AIPromptAPILegacyIdentifiers",
public: true,
},
{
// Gates access to legacy sampling parameter surfaces for "AIPromptAPI".
// Enabled in extension contexts.
name: "AIPromptAPILegacyParams",
public: true,
},
{
name: "AIPromptAPIMultimodalInput",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
"default": "",
},
},
{
// Gates access to inference parameter enhancements for "AIPromptAPI".
// This feature alone does not expose any "AIPromptAPI" feature access.
name: "AIPromptAPIParams",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
origin_trial_feature_name: "AIPromptAPIParams",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
origin_trial_allows_third_party: true,
},
{
// Gates access to the responseConstraint enhancement for "AIPromptAPI".
// This feature alone does not expose any "AIPromptAPI" feature access.
name: "AIPromptAPIStructuredOutput",
status: "stable",
},
{
// Gates access to the tool use (function calling) enhancement for
// "AIPromptAPI". This feature alone does not expose any "AIPromptAPI"
// feature access.
name: "AIPromptAPIToolUse",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
},
{
name: "AIProofreadingAPI",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
origin_trial_feature_name: "AIProofreaderAPI",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
origin_trial_allows_third_party: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "AIRewriterAPI",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
origin_trial_feature_name: "AIRewriterAPI",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
origin_trial_allows_third_party: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "AIRewriterAPIForWorkers",
public: true,
},
{
name: "AISummarizationAPI",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
"default": "",
},
},
{
name: "AISummarizationAPIForWorkers",
public: true,
},
{
name: "AISummarizationPerformancePreference",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
},
{
name: "AIWriterAPI",
status: {
"Win": "experimental",
"Mac": "experimental",
"Linux": "experimental",
"ChromeOS": "experimental",
"default": "",
},
origin_trial_feature_name: "AIWriterAPI",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
origin_trial_allows_third_party: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "AIWriterAPIForWorkers",
public: true,
},
{
name: "AlignZoomToCenter",
status: "stable",
},
{
name: "AllImagesPaintedSentToElementTiming",
status: "experimental",
},
{
name: "AllowContentInitiatedDataUrlNavigations",
base_feature: "none",
},
{
name: "AllowPreloadingWithCSPMetaTag",
status: "experimental",
},
{
name: "AllowSvgUseToReferenceExternalDocumentRoot",
status: "stable",
},
{
name: "AllowSyntheticTimingForCanvasCapture",
base_feature: "none",
status: {
"Mac": "stable",
"default": ""
}
},
{
name: "AllowURNsInIframes",
base_feature: "none",
},
{
// Instead of creating a new DOMStringList on every access to
// location.ancestorOrigins, return the ancestor origins list
// stored on Document.
// This was added in M147 and can be removed after M149.
// https://issues.chromium.org/issues/483610021
name: "AncestorOriginsStoredOnDocument",
status: "stable",
},
{
// Kill switch for https://crbug.com/415834974 which changes anchor
// positioning adjustments to occur even in cases where there is no
// scrollable overflow.
name: "AnchorPositionAdjustmentWithoutOverflow",
status: "stable",
},
{
name: "AndroidDownloadableFontsMatching",
base_feature: "none",
public: true,
},
{
// https://chromestatus.com/feature/6046278267043840
name: "AnimationEventAnimation",
status: "stable",
},
{
// https://chromestatus.com/feature/5083257285378048
name: "AnimationProgressAPI",
status: "stable",
},
{
// https://issues.chromium.org/issues/546237331
name: "AnimationRangeRejectRelativeLengths",
status: "experimental",
},
{
// https://drafts.csswg.org/web-animations-2/#triggers
name: "AnimationTrigger",
status: "stable",
implied_by: ["EventTrigger", "TimelineTrigger"],
},
{
name: "AnimationWorklet",
},
{
// crbug.com/538260158
name: "AnnotationSpaceForMultiCol",
status: "experimental",
depends_on: ["AnnotationSpaceOnStart"],
},
{
// crbug.com/445727139
name: "AnnotationSpaceOnStart",
status: "stable",
},
{
name: "AnonymousIframe",
status: "stable",
},
{
name: "AOMAriaRelationshipProperties",
public: true,
status: "stable",
},
{
name: "AOMAriaRelationshipPropertiesAriaOwns",
public: true,
status: "experimental",
depends_on: ["AOMAriaRelationshipProperties"],
},
{
// appearance:base for in-page form controls.
// https://drafts.csswg.org/css-forms-1/
// https://issues.chromium.org/issues/450139531
// https://chromestatus.com/feature/5104958101913600
name: "AppearanceBase",
status: "experimental",
},
{
// Restricts the `display` adjustment in LayoutTheme::AdjustStyle() to
// elements which have a native widget appearance, so that `appearance`
// no longer changes `display` on other elements.
// See https://crbug.com/568576344 and https://crbug.com/408002786.
name: "AppearanceDisplayAdjustmentForWidgetsOnly",
status: "stable",
},
{
name: "ApproximateGeolocationPermission",
// This feature is controlled by the kApproximateGeolocationPermission
// base::Feature in the browser process.
base_feature: "none",
},
{
// Gates the returned accuracyMode parameter upon permissions.query({name: "geolocation"})
name: "ApproximateGeolocationPermissionAccuracyMode",
depends_on: ["ApproximateGeolocationPermission"],
},
{
// Gates the new permission "geolocation-approximate".
name: "ApproximateGeolocationPermissionAPI",
depends_on: ["ApproximateGeolocationPermission"],
},
{
name: "ApproximateGeolocationWebVisibleAPI",
depends_on: ["ApproximateGeolocationPermission"],
status: {"Android": "stable", "default": "experimental"},
},
{
name: "AppTitle",
status: "experimental",
origin_trial_feature_name: "AppTitle",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
base_feature: "WebAppEnableAppTitle",
},
{
name: "AriaActions",
// Not yet implemented on ChromeOS or Android, per the M151 launch
// intent (https://groups.google.com/a/chromium.org/g/blink-dev/c/DNE6dB1AS0Y).
// Note that omitting the "Android" key disables the feature on both
// Chrome for Android and Android WebView.
status: {"Win": "stable", "Mac": "stable", "Linux": "stable"},
},
{
name: "AriaNotify",
status: {"Android": "stable", "Win": "stable", "Mac": "stable", "Linux": "stable"},
implied_by: ["AriaNotifyV2"],
},
{
name: "AriaNotifyV2",
status: {"Android": "test", "Win": "test", "Mac": "test", "Linux": "test"},
},
{
name: "AriaRowColIndexText",
status: "stable",
},
{
name: "AttributionReporting",
status: "stable",
base_feature: "none",
public: true,
},
{
// The transition to "running" after construction happens asynchronously.
// Same for the transition to "suspended" after suspend() is called.
// https://webaudio.github.io/web-audio-api/#AudioContext-constructors
name: "AudioContextAsyncStateTransitions",
status: "experimental",
},
{
// AudioContext.playbackStats interface.
name: "AudioContextPlaybackStats",
status: "stable",
},
{
name: "AudioContextSetSinkId",
status: "stable",
},
{
name: "AudioOutputDevices",
// Android support for switching audio output devices is not stable
status: {"Android": "", "default": "stable"},
public: true,
base_feature: "none"
},
{
name: "AudioVideoTracks",
status: "experimental",
},
{
// Shared MessagePort between AudioWorklet and AudioWorkletGlobalScope.
// https://chromestatus.com/feature/5079784523694080
name: "AudioWorkletSharedPort",
status: "experimental",
},
{
// https://drafts.csswg.org/css-scroll-snap
name: "AuthorSpecifiedLayoutScrollSnapBehavior",
status: "stable",
},
{
name: "AutoDarkMode",
base_feature: "none",
},
{
// When enabled, the dark mode filter (Auto Dark / force-dark) skips
// applying dark mode to images entirely; all images are kept untouched
// as if they are in light mode.
// P.N. `AutoDarkMode` needs to be applied separately.
name: "AutoDarkModeSkipImages",
base_feature: "none",
},
{
name: "AutoDarkModeSVGSizeThreshold",
status: "stable",
},
{
name: "Autofill",
public: true,
status: "test",
base_feature: "none",
},
{
name: "AutofillEvent",
origin_trial_feature_name: "AutofillEvent",
origin_trial_allows_third_party: true,
status: "experimental",
public: true,
},
{
// Pins a generic font-family on the autofill preview pseudo-elements so
// an author @font-face cannot oracle the previewed text.
// crbug.com/517710554.
name: "AutofillPreviewGenericFontFamily",
status: "stable",
},
{
// Makes form control elements have a hard coded font when they are in
// their autofill previewed state.
name: "AutofillPreviewIgnoreAuthorFont",
status: "stable",
},
{
name: "AutomationControlled",
base_feature: "none",
public: true,
settable_from_internals: true,
},
{
name: "AutoPictureInPictureVideoHeuristics",
status: "experimental",
},
{
name: "AutoSizeUsesScrollWidthForOverflow",
status: "stable",
},
{
// Killswitch M156.
name: "AvoidEmbeddedContentViewLocation",
status: "stable",
},
{
// Don't use a position inside non-selectable content as a selection
// boundary when it has no canonical position, which collapses the whole
// selection. See https://crbug.com/553831659.
name: "AvoidNonSelectableSelectionBoundary",
status: "stable",
},
{
// Disables the synchronous focus blur behavior when a focused form control
// is disabled.
name: "AvoidSynchronousBlurOnDisabledAttributeChange",
status: "stable",
},
// When enabled, enforces new interoperable semantics for 3D transforms.
// See crbug.com/1008483.
{
name: "BackfaceVisibilityInterop",
},
{
name: "BackForwardCache",
base_feature: "none",
public: true,
},
{
name: "BackForwardCacheExperimentHTTPHeader",
origin_trial_feature_name: "BackForwardCacheExperimentHTTPHeader",
status: "experimental",
base_feature: "none",
},
{
name: "BackForwardCacheNotRestoredReasons",
status: "stable",
origin_trial_feature_name: "BackForwardCacheNotRestoredReasons",
base_feature: "BackForwardCacheSendNotRestoredReasons",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "BackForwardCacheRestorationPerformanceEntry",
status: "experimental",
},
{
name: "BackForwardCacheUpdateNotRestoredReasonsName",
status: "stable",
},
{
name: "BackgroundClipTextDecoration",
status: "stable",
},
{
name: "BackgroundFetch",
public: true,
status: "stable",
base_feature: "none",
},
// A developer opt-out for background page freezing.
{
name: "BackgroundPageFreezeOptOut",
base_feature: "none",
origin_trial_feature_name: "BackgroundPageFreezeOptOut",
origin_trial_type: "deprecation",
},
{
name: "BarcodeDetector",
status: {
// Built-in barcode detection APIs are only available from some
// platforms. See //services/shape_detection.
"Android": "stable",
"ChromeOS": "stable",
"Mac": "stable",
"default": "test",
},
},
{
// Removes special layout code from customizable select which was
// preventing it from growing in the inline direction.
name: "BaseAppearanceInlineSizing",
status: "stable",
},
{
// closest-corner/farthest-corner in circle()/ellipse().
// crbug.com/361617757
name: "BasicShapeCornerRadius",
status: "experimental",
},
{
name: "BidiCaretAffinity",
},
{
// Visual caret movement in bidirectional text. When enabled, arrow
// keys move the caret in the visual (screen) direction rather than
// the logical (DOM/memory) order.
// Requires BidiCaretAffinity to be enabled for correct caret
// rendering at bidi boundaries.
name: "BidiVisualOrderCaretMovement",
depends_on: ["BidiCaretAffinity"],
},
{
name: "BlinkExtensionWebView",
public: true,
},
{
name: "BlinkExtensionWebViewMediaIntegrity",
public: true,
},
// Whether MapToVisualRectInAncestorSpace() with a null ancestor can
// use the geometry mapper fast path.
{
name: "BlinkGeometryMapperViewportFastPath",
status: "stable",
},
{
name: "BlinkLifecycleScriptForbidden",
},
{
name: "BlinkRuntimeCallStats",
},
{
// https://chromestatus.com/feature/4830298126417920
name: "BlobBytes",
status: "stable",
},
{
name: "BlockingFocusWithoutUserActivation",
status: "experimental",
origin_trial_feature_name: "BlockingFocusWithoutUserActivation",
},
{
// Prevents the popup document for the select element from being opened
// if the corresponding OS window is not focused. Enabled in M147, can be
// removed in M150.
name: "BlockSelectPopupUnfocusedWindow",
status: "stable",
},
// https://crbug.com/415304289: Mouse and Pointer boundary event dispatch
// (i.e. dispatch of enter, leave, over, out events) tracks DOM node removal
// to fix event pairing on ancestor nodes.
{
name: "BoundaryEventDispatchTracksNodeRemoval",
public: true,
status: "stable",
},
{
name: "BoxDecorationBreakCloneLineBreaking",
status: "test",
},
{
name: "BrowserInitiatedAutomaticPictureInPicture",
public: true,
status: "experimental",
},
{
name: "BufferedBytesConsumerLimitSize",
status: "stable",
},
{
// Bypasses the enforcement of the Page Embedded Permission Control
// security checks. This flag is disabled by default and should only be
// enabled in automated tests in order to allow them to avoid needing to
// wait until the PEPC is validated and also to use JS-initiated clicks.
name: "BypassPepcSecurityForTesting",
},
{
// Enables RFC 7234-compliant Cache-Control header parsing, removing RFC
// 2616 separators that are not valid in RFC 7234.
// https://crbug.com/42050325
name: "CacheControlRFC7234Parsing",
status: "experimental",
},
{
// Enables metrics collection comparing RFC 7234 vs RFC 2616 Cache-Control
// parsing. Performs double parsing on every Cache-Control header to
// measure behavioral differences. Can be disabled as a kill switch if
// performance issues arise.
// https://crbug.com/42050325
name: "CacheControlRFC7234ParsingMetrics",
status: "experimental",
},
{
name: "CacheStorageCodeCacheHint",
origin_trial_feature_name: "CacheStorageCodeCacheHint",
status: "experimental",
base_feature: "none",
},
{
// For emergency flag flips in case we discover bad bugs.
name: "CacheStyleAdjuster",
status: "stable",
},
{
// Enables the <camera> and <microphone> HTML elements, allowing sites to
// embed camera and microphone permission request controls directly in the page.
// https://chromestatus.com/feature/5153829504024576
name: "CameraAndMicrophoneElements",
status: "stable",
public: true,
},
{
name: "Canvas2dCanvasFilter",
status: "experimental",
},
{
// When enabled, avoids eagerly flushing raster draw ops in FinalizeFrame
// for composited 2D canvases, deferring the flush to
// PrepareTransferableResource.
name: "Canvas2dDeferredFlush",
status: "experimental",
},
{
name: "Canvas2dLayers",
},
{
name: "Canvas2dLayersWithOptions",
status: "experimental",
depends_on: ["Canvas2dLayers"],
},
{
name: "Canvas2dMesh",
origin_trial_feature_name: "Canvas2dMesh",
origin_trial_allows_third_party: true,
status: "test",
},
{
// https://github.com/WICG/html-in-canvas/blob/main/README.md
// Note the API name has changed to `drawElementImage`.
name: "CanvasDrawElement",
origin_trial_feature_name: "HTMLInCanvas",
status: "stable",
},
{
name: "CanvasFloatingPoint",
status: "stable",
},
{
// Canvas2D API for specifying HDR headroom for drawing operations.
// https:/crbug.com/428575083, https://github.com/whatwg/html/issues/11165
name: "CanvasGlobalHDRHeadroom",
status: "experimental",
},
{
// https://crbug.com/394052224
name: "CanvasGradientCSSColor4",
status: "experimental",
},
{
name: "CanvasHDR",
status: "experimental",
},
{
// Kill switch for https://crbug.com/385194416. Makes the canvas 2D
// context's `direction` getter reflect the stored keyword (including
// "inherit") instead of always resolving it to "ltr"/"rtl".
name: "CanvasTextDirectionReflect",
status: "stable",
},
{
// https://crbug.com/479240778
name: "CanvasTextMetricsPreciseBounds",
status: "experimental",
},
{
// Canvas2D API for specifying HDR tone mapping behavior.
// https:/crbug.com/448552449, https://github.com/whatwg/html/issues/11424
name: "CanvasToneMapping",
status: "experimental",
},
{
// Kill switch for https://crbug.com/330506337.
name: "CanvasUsesArcPaintOp",
status: "stable",
},
{
// Enables capability delegation for the Digital Credentials API (both
// create and get requests).
// https://crbug.com/512747131
name: "CapabilityDelegationDigitalCredentials",
},
{
name: "CapabilityDelegationDisplayCaptureRequest",
status: "experimental",
},
{
name: "CapabilityDelegationPopup",
status: "experimental",
},
{
// Enables icon-only mode for capability elements.
// https://issues.chromium.org/issues/514564817
name: "CapabilityElementIconOnlyMode",
},
{
// Considers the full previous code point (not one UTF-16 code unit) for
// text-transform: capitalize word boundaries. Kill switch for
// crbug.com/501115609.
name: "CapitalizeAfterSupplementaryCharacterFix",
status: "stable",
},
{
name: "CaptureController",
status: {"Android": "", "default": "stable"},
},
{
// TODO(crbug.com/1444712): Before enabling that flag by default,
// make sure MouseCursorOverlayController does not transmit mouse
// events to a CaptureController that don't have any
// capturedmousechange listener attached to it.
// See https://github.com/screen-share/mouse-events/issues/14
name: "CapturedMouseEvents",
"depends_on": ["CaptureController"],
status: {"Android": "", "default": "test"},
},
{
name: "CapturedSurfaceControl",
status: {"Android": "", "default": "stable"}
},
{
name: "CapturedSurfaceResolution",
status: { "Win": "stable", "Mac": "stable", "ChromeOS": "stable", "default": ""},
},
{
name: "CaptureHandle",
depends_on: ["GetDisplayMedia"],
status: {"Android": "", "default": "stable"},
},
{
// Allows automated test runners to keep focused carets visible.
name: "CaretBlinking",
status: "stable",
},
{
// Keeps the caret outside an editable atomic inline - e.g.
// <div contenteditable style="display:inline-block"> - for a click that
// landed next to the box rather than on it.
// https://crbug.com/40780191
name: "CaretOutsideEditableAtomicInline",
status: "stable",
},
{
// Kill switch for changes to RenderFrameMetadataObserverImpl in connection with Engagement
// Signals. See https://crrev.com/c/4544201 and https://crbug.com/1458640.
name: "CCTNewRFMPushBehavior",
base_feature_status: "enabled",
},
{
// Compression Dictionary Transport: Align handling of crossorigin
// attribute on the spec.
name: "CDTNewCrossOriginHandling",
status: "experimental",
},
{
// Compression Dictionary Transport: Use "compression-dictionary" as the
// destination string.
name: "CDTNewDestination",
status: "experimental",
},
{
// Compression Dictionary Transport: Align handling of referrerpolicy
// attribute and referrer on the spec.
name: "CDTNewReferrerAndReferrerPolicyHandling",
status: "experimental",
},
{
name: "CheckableInputTypeLayoutInline",
status: "stable",
},
{
// Run the CSP "Should element's inline behavior be blocked?" check when
// an event handler content attribute is set to an inline script.
// See the specs:
// https://html.spec.whatwg.org/multipage/webappapis.html#event-handler-content-attributes
// https://w3c.github.io/webappsec-csp/#should-block-inline
name: "CheckCSPOnInlineScriptAttributeSet",
status: "stable",
},
{
// crbug.com/517429018
name: "ClampUnfocusedSelectionCache",
status: "stable",
},
{
// This is a kill switch for a refactor of the way activation
// behaviors are triggered. It should not affect behavior.
// This flag shipped in M157 and can be removed in M160.
name: "CleanUpActivationBehavior",
status: "stable",
},
{
// Set currentTarget to null after dispatch for EventTarget.
// This was added in M142 and can be removed after M144.
// https://issues.chromium.org/issues/346766786
name: "ClearCurrentTargetAfterDispatch",
status: "stable",
},
{
// Killswitch crbug.com/547894783
name: "ClearDisplayLockPrePaintFlags",
status: "stable",
},
{
// Fixes a bug where ancestor elements retain a stale :focus-within
// state if the focused element's subtree is removed during blur
// or focusout events.
// This was added in M147 and can be removed after M149.
// https://issues.chromium.org/issues/454668198
// https://issues.chromium.org/issues/457465869
name: "ClearFocusWithinOnSubtreeRemoval",
status: "stable",
},
{
// Determine clearing of target and relatedTarget by checking
// if the top node is in shadow tree.
// This was added in M142 and can be removed after M144.
// https://issues.chromium.org/issues/373655918
// https://issues.chromium.org/issues/40253359
name: "ClearTargetOnlyIfInShadowTree",
status: "stable",
},
{
// Uses ComputeContainerNode() instead of AnchorNode() for clipboard event
// targeting so that kBeforeAnchor/kAfterAnchor selections correctly target
// the containing parent element rather than the element itself.
// See https://crbug.com/40684204
name: "ClipboardEventTargetUsesContainerNode",
status: "stable",
},
{
// It is only enabled in extension environment.
name: "ClipboardOnExtensionServiceWorker",
base_feature: "none",
public: true,
},
{
// Fix middle-click paste (kSelection buffer) from leaking images on
// the kStandard buffer via the image fallback in GetFragmentFromClipboard.
// crbug.com/497251066
name: "ClipboardPasteImageRespectBuffer",
status: "stable",
},
{
// TODO(crbug.com/440374239): Disabled due to https://crbug.com/440374239.
name: "ClipElementVisibleBoundsInLocalRoot",
},
{
name: "ClipPathNestedRasterOptimization",
status: "stable",
},
{
// Avoid queuing a task to fire a selectionchange event when there is already a task scheduled
// to do that for the target according to the new spec:
// https://w3c.github.io/selection-api/#scheduling-selectionhange-event
name: "CoalesceSelectionchangeEvent",
status: "stable",
},
{
name: "CoepReflection",
status: "test",
},
{
// Allows <input type=color> to accept any valid CSS color value
// (named colors, rgb(), hsl(), system colors, etc.) in addition to
// the legacy 7-character hex format (#rrggbb).
// https://crbug.com/40226268
// This was added in M146 and can be removed after M148.
name: "ColorInputAcceptsCSSColors",
status: "stable",
},
// Enable the display-p3-linear color space in CSS.
// https://chromestatus.com/feature/5162372125818880
{
name: "ColorSpaceDisplayP3Linear",
status: "stable",
},
// Enable the srgb-linear and display-p3-linear color spaces in
// PredefinedColorSpace.
// https://chromestatus.com/feature/5122501071994880
{
name: "ColorSpacePredefinedLinearSpaces",
status: "stable",
},
// Enable the rec2100-linear color space in CSS and PredefinedColorSpace.
// https://chromestatus.com/feature/5204024772788224
{
name: "ColorSpaceRec2100Linear",
status: "experimental",
},
{
// Return the current target from composedPath() while
// dispatching.
// This was added in M142 and can be removed after M144.
// https://issues.chromium.org/issues/444932649
// https://issues.chromium.org/issues/346766786
name: "ComposedPathReturnTargetBeingDispatched",
status: "stable",
},
{
name: "CompositeBGColorAnimation",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "CompositeBoxShadowAnimation",
},
{
name: "CompositeClipPathAnimation",
status: "stable",
public: true,
},
{
name: "CompositedSelectionUpdate",
public: true,
status: {
"Android": "stable",
"ChromeOS": "stable",
"Fuchsia": "stable",
"Linux": "stable",
"Win": "stable",
},
base_feature: "none",
},
{
name: "CompositingDecisionAtAnimationPhaseBoundaries"
},
{
name: "CompositionForegroundMarkers",
status: {
"Android": "stable",
"default": "",
}
},
{
// When enabled, EventTriggers[1] will function via cc::EventTrigger
// objects that live on the compositor thread.
// [1] https://drafts.csswg.org/css-animations-2/#event-triggers
name: "CompositorEventTrigger"
},
{
// When enabled, TimelineTriggers[1] will function via cc::TimelineTrigger
// objects that live on the compositor thread.
// [1] https://drafts.csswg.org/css-animations-2/#timeline-triggers
name: "CompositorTimelineTrigger",
status: "stable",
},
{
name: "CompressionDictionaryTransport",
base_feature: "none",
public: true,
},
{
name: "ComputedAccessibilityInfo",
status: "experimental",
},
{
name: "ComputePressure",
status: {
"Android": "",
"default": "stable",
}
},
{
// If enabled, allow concurrent animations via native paint worklets to
// run on the compositor thread.
name: "ConcurrentNativePaintWorklets",
status: "experimental",
},
{
name: "ConditionalTracingLoAF",
status: "experimental",
},
{
// Connection-Allowlist embedded enforcement: the `connectionallowlist`
// iframe attribute, by which an embedder requires a Connection-Allowlist
// of the document it frames. `base_feature_status` and
// `copied_from_base_feature_if` give the origin trial a Finch kill
// switch. See https://github.com/WICG/connection-allowlists/issues/1.
name: "ConnectionAllowlistEmbeddedEnforcement",
origin_trial_feature_name: "ConnectionAllowlistEmbeddedEnforcement",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
status: "experimental",
},
{
name: "ConstructableStylesheetCache",
status: "test",
},
{
name: "ContactsManager",
status: {"Android": "stable", "default": "test"},
},
{
name: "ContactsManagerExtraProperties",
status: {"Android": "stable", "default": "test"},
},
{
name: "ContainerTiming",
origin_trial_feature_name: "ContainerTiming",
origin_trial_allows_third_party: true,
status: "experimental",
},
{
name: "ContentIndex",
status: {"Android": "stable", "default": "experimental"},
},
{
name: "ContextMenu",
status: "experimental",
},
{
// Enable support for Controlled Frame, providing the Controlled
// Frame tag to IWA apps and other contexts. See
// https://github.com/WICG/controlled-frame/blob/main/README.md for more
// info.
name: "ControlledFrame",
public: true,
status: "stable",
},
{
// Enable support for requesting SecurityInfo in WebRequest API
// for controlled frames. See
// https://wicg.github.io/controlled-frame/#dictdef-securityinfo for more
// info.
name: "ControlledFrameWebRequestSecurityInfo",
status: "stable",
depends_on: ["ControlledFrame"],
},
{
// Enables setting the `maxAge` option when creating a cookie in the
// Cookie Store API.
name: "CookieStoreAPIMaxAge",
public: true,
status: "stable",
},
{
// Feature flag for stripping \t and space from Cookie names and values.
// https://crbug.com/437345480
name: "CookieStoreAPIWhitespaceStripping",
status: "stable",
},
{
name: "CoopRestrictProperties",
origin_trial_feature_name: "CoopRestrictProperties",
base_feature: "none",
},
{
// Corrects the handling of <form> elements nested within <template> tags
// in HTML parsing. See https://crbug.com/352896478 for details.
name: "CorrectTemplateFormParsing",
status: "experimental"
},
{
name: "CorsRFC1918",
},
{
// CPU Performance API
// https://chromestatus.com/feature/5189864286978048
// https://github.com/WICG/cpu-performance/
name: "CpuPerformance",
status: "stable",
origin_trial_feature_name: "CpuPerformance",
origin_trial_allows_third_party: true,
},
{
name: "CrashReportingStorageAPI",
status: "stable",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
origin_trial_feature_name: "CrashReportingStorageAPI",
},
{
name: "CreateInlineContentsAnonymousBlock",
status: "stable",
},
{
// TODO(crbug.com/547302825): Do not enable this feature before adding
// Permissions Policy support.
name: "CrossOriginStorage",
base_feature: "CrossOriginStorage",
public: true,
},
{
// When enabled, allowlisting script urls and scripts used in eval via
// hashes will be supported in script-src. This is a no-op if the
// network::features::kCSPScriptSrcHashesInV1 flag is off, since it
// controls parsing in the network service.
// See crbug.com/392657736 for details.
name: "CSPHashesV1",
base_feature: "none",
origin_trial_feature_name: "CSPExtendedScriptSrcHashes",
origin_trial_os: ["win", "linux", "mac", "android", "chromeos"],
status: "experimental",
public: true,
},
{
name: "CSPReportHash",
status: "stable",
},
{
// The AccentColor And AccentColorText CSS system color keywords
name: "CSSAccentColorKeyword",
status: {
"ChromeOS": "stable",
"Linux": "stable",
"Mac": "stable",
"Win": "stable",
"default": "experimental",
},
},
{
// Maps deprecated ActiveCaption to Canvas instead of CanvasText.
// https://drafts.csswg.org/css-color-4/#deprecated-system-colors
// https://crbug.com/41493724
name: "CSSActiveCaptionMapsToCanvas",
status: "stable",
},
{
// Ship in M152, should be removed in M154.
// https://drafts.csswg.org/css-color-5/#relative-alpha
// https://chromestatus.com/feature/5070160203481088
name: "CSSAlphaColorFunction",
status: "stable",
},
{
// https://crbug.com/543376113
name: "CSSAlphaColorFunctionRequiresAlpha",
status: "stable",
},
{
// Allows using counter() and counters() in alt text (after / in content property).
name: "CSSAltCounter",
status: "stable",
},
{
// https://drafts.csswg.org/web-animations-2/#iteration-composite-operation
name: "CSSAnimationIterationComposite",
status: "experimental",
},
{
// https://drafts.csswg.org/css-values-5/#early-resolution
name: "CSSArgumentGrammar",
status: "test",
},
{
// Whether <image> values are allowed as counter style <symbol>
name: "CSSAtRuleCounterStyleImageSymbols",
},
{
// https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as
name: "CSSAtRuleCounterStyleSpeakAsDescriptor",
status: "test",
},
{
// https://crbug.com/41089999: Legacy ASCII case-insensitive attribute
// value matching only applies to HTML elements, so SVG and
// empty-namespace elements compare attribute values case-sensitively.
// Enabled by default; kept as a killswitch.
name: "CSSAttributeValueCaseSensitiveNonHTML",
status: "stable",
},
{
// https://chromestatus.com/feature/6234471210811392
// Ship in M150, should be removed in M152.
name: "CSSBackgroundClipBorderArea",
status: "stable",
},
{
// Makes the computed value of the background-* longhands keep the number
// of comma-separated values the author specified, instead of repeating or
// truncating it to the background-image layer count. Repeating and
// truncating are used-value behaviour: "The computed values of the
// coordinating list properties are not affected by such truncation or
// repetition."
// https://drafts.csswg.org/css-values-4/ Appendix A
// https://drafts.csswg.org/css-backgrounds/#layering
// https://github.com/w3c/csswg-drafts/issues/7164
name: "CSSBackgroundLayerCountIndependence",
status: "experimental",
},
// https://chromestatus.com/feature/5459864205393920
{
// https://chromestatus.com/feature/5125388091260928
name: "CSSBorderShape",
status: "stable",
},
{
// Attempts to "fold" a calc() value to NaN or +/-Infinity when producing
// a CalculationValue. Can produce incorrect results if the expression
// contains percentages.
name: "CSSCalcEarlyNaNAndInfFolding",
},
{
// Support CSS Values Level 4 calc simplification and serialization
// as specified in the specs below.
// https://drafts.csswg.org/css-values-4/#calc-simplification
// https://drafts.csswg.org/css-values-4/#calc-serialize
name: "CSSCalcSimplificationAndSerialization",
},
{
// https://chromestatus.com/feature/5082469066604544
name: "CSSCaretAnimation",
status: "stable",
},
{
// Two-value caret-color: <color> [<color>]?
// https://github.com/w3c/csswg-drafts/issues/13723
name: "CSSCaretColorWithOptionalSecondValue",
status: "experimental",
},
{
// https://chromestatus.com/feature/6106160780017664
name: "CSSCaretShape",
status: "stable",
},
{
// Support case-sensitive attribute selector modifier
// https://drafts.csswg.org/selectors-4/#attribute-case
name: "CSSCaseSensitiveSelector",
status: "test",
},
{
// In the cases where it is impossible or impractical to determine the
// measure of the “0” glyph, it must be assumed to be 0.5em wide by 1em
// tall. Thus, the ch unit falls back to 0.5em in the general case, and to
// 1em when it would be typeset upright (i.e. writing-mode is vertical-rl or
// vertical-lr and text-orientation is upright).
// https://drafts.csswg.org/css-values-4/#ch
// See crbug.com/416145497 for more details.
name: "CSSChUnitSpecCompliantFallback",
status: "stable",
},
{
name: "CSSColorTypedOM",
status: "experimental",
},
// https://drafts.csswg.org/css-values-5/#progress
// container-progress()
{
name: "CSSContainerProgressNotation",
status: "experimental",
},
{
// https://drafts.csswg.org/css-conditional-5/#typedef-style-range
name: "CSSContainerStyleQueriesRange",
status: "stable",
},
{
// https://drafts.csswg.org/css-borders-4/#corner-shaping
name: "CSSCornersShorthand",
status: "experimental",
},
{
// https://drafts.csswg.org/css-lists-3/#counter-reset
// https://crbug.com/40760770
name: "CSSCounterResetReversed",
status: "experimental",
},
{
// The symbols() function for defining an anonymous counter style inline.
// https://drafts.csswg.org/css-counter-styles-3/#symbols-function
name: "CSSCounterStyleSymbolsFunction",
status: "stable",
},
{
// Unprefixed cross-fade() (in addition to the existing -webkit-cross-fade()).
// https://drafts.csswg.org/css-images-4/#cross-fade-function
name: "CSSCrossFade",
status: "experimental",
},
{
name: "CSSCustomHighlightUniversalSelector",
status: "experimental",
},
{
name: "CSSCustomMedia",
status: "test",
},
{
name: "CSSDynamicRangeLimit",
status: "stable",
},
{
// Include custom properties in CSSComputedStyleDeclaration::item/length.
// https://crbug.com/949807
name: "CSSEnumeratedCustomProperties",
status: "stable",
},
{
// The 'flow-start' and 'flow-end' box alignment keywords.
// https://github.com/w3c/csswg-drafts/issues/14052
name: "CSSFlowStartAndEnd",
status: "experimental",
},
{
// Serialize 'flex-start' and 'flex-end' as 'flow-start' and 'flow-end'
// in computed styles.
// https://github.com/w3c/csswg-drafts/issues/14052
name: "CSSFlowStartAndEndSerialization",
status: "experimental",
depends_on: ["CSSFlowStartAndEnd"],
},
{
// crbug.com/483689942
// Serialize font-family names as space-separated idents when possible,
// per CSSWG resolution. See https://github.com/w3c/csswg-drafts/issues/5846.
name: "CSSFontFamilySerialization",
status: "experimental",
},
{
name: "CSSFontSizeAdjust",
status: "stable",
},
{
// https://drafts.csswg.org/css-mixins-1/#function-rule
name: "CSSFunctions",
status: "stable",
},
{
name: "CSSGridLanesLayout",
status: "experimental",
public: true,
},
{
name: "CSSHangingPunctuation",
status: "test",
},
{
// This needs to be kept as a runtime flag as long as we need to forcibly
// disable it for WebView on Android versions older than P. See
// https://crrev.com/f311a84728272e30979432e8474089b3db3c67df
name: "CSSHexAlphaColor",
status: "stable",
},
{
// https://drafts.csswg.org/css-values-5/#ident
name: "CSSIdentFunction",
status: "test",
},
{
// https://chromestatus.com/feature/5078177326170112
name: "CSSImageAnimation",
status: "test",
},
{
// image(<color>) functional notation, producing a solid-color image
// with no natural dimensions.
// Ship in M150, should be removed in M152.
// https://drafts.csswg.org/css-images-4/#funcdef-image
// https://chromestatus.com/feature/5121011285622784
name: "CSSImageFunction",
status: "stable",
},
{
// The inherit() function works like var(), except that it grabs
// the computed value of the specified property from the parent style
// instead of the current style.
//
// https://drafts.csswg.org/css-values-5/#inherit-notation
name: "CSSInheritFunction",
status: "experimental",
},
{
// The :in-range and :out-of-range pseudo-classes support matching against
// <input type=time> elements with a reversed range.
// https://html.spec.whatwg.org/multipage/input.html#has-a-reversed-range
name: "CSSInRangeOutOfRangeReversedRanges",
status: "stable",
},
{
// https://chromestatus.com/feature/6289894144212992
name: "CSSKeyframesRuleLength",
status: "stable",
},
{
// Support for extended language ranges in :lang()
// https://chromestatus.com/feature/5071058079055872
name: "CSSLangExtendedRanges",
status: "experimental",
},
{
name: "CSSLayoutAPI",
status: "experimental",
},
{
// light-dark() for image values (background-image, etc.)
// Ship in M150, should be removed in M152.
// https://drafts.csswg.org/css-color-5/#light-dark
// https://chromestatus.com/feature/5123253146353664
name: "CSSLightDarkImage",
status: "stable",
},
{
name: "CSSLineClamp",
status: "experimental",
},
{
name: "CSSLineClampAsShorthand",
depends_on: ["CSSLineClamp"],
status: "test"
},
{
name: "CSSLineClampLineBreakingEllipsis",
depends_on: ["CSSLineClamp"],
status: "experimental",
},
{
// https://chromestatus.com/feature/5095153430822912
name: "CSSLinkParametersProperty",
status: "experimental",
},
{
// Implements `counter-increment` and `counter-set` for the non-<li>
// elements and the reversed ordered lists.
//
// https://crbug.com/40682542
name: "CSSListCounterAccounting",
status: "experimental",
},
{
// Allows pseudo-element selectors within logical combination pseudo-
// classes, e.g. :is(div::before).
//
// https://crbug.com/444386484
name: "CSSLogicalCombinationPseudo",
},
{
name: "CSSMarkerNestedPseudoElement",
status: "stable",
},
{
// https://github.com/explainers-by-googlers/css-shrink-to-fit
name: "CssMaxContentSizing",
status: "test",
},
{
// Pseudo-classes :playing, :paused, :seeking, :buffering, :stalled,
// :muted, and :volume-locked for media elements.
// https://drafts.csswg.org/selectors/#resource-pseudos
name: "CSSMediaElementPseudos",
status: "experimental",
},
{
// https://drafts.csswg.org/css-values-5/#progress
// media-progress()
name: "CSSMediaProgressNotation",
status: "experimental",
},
{
name: "CSSMixins",
status: "experimental",
},
{
name: "CSSNestedPseudoElements",
status: "stable",
},
{
// https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle
name: "CSSOMGetComputedStylePseudoElementRequiresColon",
status: "experimental",
},
{
name: "CSSPaintAPIArguments",
status: "experimental",
},
{
// Ignore the stylesheet encoding when parsing URLs, always using UTF-8.
// See crbug.com/1485525.
name: "CSSParserIgnoreCharsetForURLs",
},
{
// Support `polygon(round <length>, ...)` per CSS Shapes Level 1.
// Spec: https://www.w3.org/TR/css-shapes-1/#typedef-basic-shape
// Issue: https://crbug.com/329302249
// https://chromestatus.com/feature/6636392944893952
// Ship in M150, should be removed in M152.
name: "CSSPolygonRounding",
status: "stable",
},
{
name: "CSSPositionStickyStaticScrollPosition",
status: "test",
},
{
// Support for `position-visibility: anchor-valid`.
// See crbug.com/333421963.
name: "CSSPositionVisibilityAnchorValid",
status: "stable",
},
{
// The @private rule declares lexically-scoped custom properties that are
// visible only within the enclosing style rule and the elements it
// matches, with their names rewritten so they are never observable as
// author custom properties.
// crbug.com/542651959
name: "CSSPrivate",
status: "experimental",
},
// https://drafts.csswg.org/css-values-5/#progress
// progress()
{
name: "CSSProgressNotation",
status: "stable",
},
{
// For ::column pseudo-element for fragment styling.
// https://github.com/flackr/carousel/blob/main/fragmentation/README.md
name: "CSSPseudoColumn",
status: "stable",
},
{
name: "CSSPseudoElementBackdrop",
status: "stable",
},
{
name: "CSSPseudoElementInterface",
status: "stable",
},
{
name: "CSSPseudoElementScrollButton",
depends_on: ["CSSPseudoElementInterface"],
status: "experimental",
},
{
// CSSPseudoElement.selectorText.
// https://drafts.csswg.org/css-pseudo-4/#dom-csspseudoelement-selectortext
name: "CSSPseudoElementSelectorText",
depends_on: ["CSSPseudoElementInterface"],
status: "experimental",
},
{
name: "CSSPseudoElementViewTransitions",
depends_on: ["CSSPseudoElementInterface"],
status: "stable",
},
{
// Enables the :has-slotted pseudo-selector.
// https://chromestatus.com/feature/5134941143433216
name: "CSSPseudoHasSlotted",
status: "experimental",
},
{
// For ::scroll-up-button and ::scroll-down-button pseudo-elements for Carousel.
// https://github.com/flackr/carousel/tree/main/scroll-button
name: "CSSPseudoScrollButtons",
status: "stable",
depends_on: ["PseudoElementsFocusable"],
},
{
// For ::scroll-marker and ::scroll-marker-group pseudo-elements for Carousel.
// https://github.com/flackr/carousel/tree/main/scroll-marker
name: "CSSPseudoScrollMarkers",
status: "stable",
depends_on: ["PseudoElementsFocusable"],
},
{
name: "CSSRandomFunction",
status: "stable",
},
{
name: "CSSRandomFunctionTypedOM",
status: "test",
depends_on: ["CSSRandomFunction"],
},
{
// Non-standard 'auto' keyword for the CSS resize property. Used for
// selectively enable resize corner for textarea via UA stylesheet, but
// unintentionally exposed to author sheets. UA rule is now using
// -internal-textarea-auto instead.
name: "CSSResizeAuto",
status: "stable",
},
{
// Kill switch for integrity() enforcement on CSS image and SVG
// document resources. See also: CSSURLRequestModifiers
name: "CSSResourceIntegrityEnforcement",
status: "stable",
},
{
name: "CSSRevertRule",
status: "stable",
},
{
// https://drafts.csswg.org/css-ruby/#ruby-overhang
// ChromeStatus: https://chromestatus.com/feature/6560118298771456
name: "CSSRubyOverhang",
status: "stable",
},
{
name: "CSSSafePrintableInset",
status: "stable",
},
{
// The '&' pseudo-class effectively behaves like :where(:scope)
// when used in @scope rules.
name: "CSSScopeifiedParentPseudoClass",
status: "stable",
},
{
// The "@import scope(...)" syntax.
// https://github.com/w3c/csswg-drafts/issues/7348
name: "CSSScopeImport",
status: "experimental",
},
{
// https://drafts.csswg.org/css-conditional-5/#scrolled
name: "CSSScrolledContainerQueries",
status: "stable",
},
{
// https://drafts.csswg.org/css-scroll-snap-2#scroll-initial-target
name: "CSSScrollInitialTarget",
status: "stable",
},
{
// https://github.com/w3c/csswg-drafts/issues/12122
name: "CSSScrollMarkerGroupModes",
status: "stable",
},
{
// https://drafts.csswg.org/css-overflow-5/#active-before-after-scroll-markers
// :target-before and :target-after pseudo classes for scroll markers.
name: "CSSScrollMarkerTargetBeforeAfter",
status: "stable",
},
{
// https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchange
name: "CSSScrollSnapChangeEvent",
status: "stable",
},
{
// https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchanging
name: "CSSScrollSnapChangingEvent",
status: "stable",
},
{
// https://drafts.csswg.org/css-scroll-snap-2/#snapevent-interface
name: "CSSScrollSnapEventConstructorExposed",
status: "experimental",
},
{
// https://drafts.csswg.org/css-scroll-snap-2/#snap-events
name: "CSSScrollSnapEvents",
status: "stable",
implied_by: ["CSSScrollSnapChangeEvent", "CSSScrollSnapChangingEvent"],
},
{
name: "CSSScrollSnapStopBefore",
status: "test",
},
{
name: "CSSScrollSnapTypePair",
status: "stable",
},
{
// scroll-target-group property
// https://drafts.csswg.org/css-overflow-5/#scroll-target-group
name: "CSSScrollTargetGroup",
status: "stable",
},
{
// scroll-target-group property sets aria-current=true on :target-current html scroll marker.
name: "CSSScrollTargetGroupAriaCurrent",
status: "experimental",
},
{
// path() and shape() basic shapes for shape-outside.
// https://drafts.csswg.org/css-shapes-1/#basic-shape-functions
// https://drafts.csswg.org/css-shapes/#shape-outside-property
// ChromeStatus: https://chromestatus.com/feature/5080980370096128
name: "CSSShapeOutsidePathAndShapeSupport",
status: "stable",
},
{
// rect() and xywh() basic shapes for shape-outside.
// https://drafts.csswg.org/css-shapes-1/#basic-shape-functions
// https://drafts.csswg.org/css-shapes/#shape-outside-property
// ChromeStatus: https://chromestatus.com/feature/6323071520735232
name: "CSSShapeOutsideRectAndXywhSupport",
status: "stable",
},
{
// https://drafts.csswg.org/cssom-1/#dom-cssstylesheetinit-baseurl
name: "CSSStyleSheetInitBaseURL",
status: "experimental",
},
{
name: "CSSSupportsAtRuleFunction",
status: "stable",
},
{
name: "CSSSupportsForImportRules",
status: "stable",
},
{
// https://chromestatus.com/feature/5153932394102784
// Shipping in M150, so flag can be removed around M152.
name: "CSSSupportsNamedFeatureFunction",
status: "stable",
},
{
// Allows the CSS "accent-color" property to support the system accent color as the default option.
name: "CSSSystemAccentColor",
status: {
"ChromeOS": "stable",
"Linux": "stable",
"Mac": "stable",
"Win": "stable",
"default": "experimental",
},
},
{
// https://issues.chromium.org/40787216: CSS `text-align: match-parent` value
name: "CSSTextAlignMatchParent",
status: "experimental",
},
{
// crbug.com/468928416, crbug.com/498974811
name: "CSSTextDecorationInset",
status: "stable",
},
{
// https://issues.chromium.org/40675832: CSS `text-decoration-skip-ink: all` value
name: "CSSTextDecorationSkipInkAll",
status: "stable",
},
{
name: "CSSTextDecorationSkipSpaces",
status: "stable",
},
{
// crbug.com/417306102
name: "CssTextFit",
status: "stable",
},
{
// crbug.com/417306102
name: "CssTextFitReshaping",
},
{
// crbug.com/1463890, crbug.com/1463891: CSS `text-spacing` shorthand
name: "CSSTextSpacing",
status: "test",
},
{
// https://crbug.com/40928177: Support of `text-transform: full-size-kana`
name: "CSSTextTransformFullSizeKana",
status: "experimental",
},
{
// https://issues.chromium.org/41297237: CSS `text-transform: full-width` value
name: "CSSTextTransformFullWidth",
status: "experimental",
},
{
// crbug.com/41297237: Support multi-keyword values in CSS `text-transform`.
name: "CSSTextTransformMultiKeyword",
depends_on: ["CSSTextTransformFullWidth", "CSSTextTransformFullSizeKana"],
status: "experimental",
},
{
// Support for the 'all' keyword of the 'timeline-scope' property.
//
// https://drafts.csswg.org/scroll-animations-1/#timeline-scope
name: "CSSTimelineScopeAll",
status: "experimental",
},
{
// Makes timeline names global by default.
//
// https://github.com/w3c/csswg-drafts/issues/12581
name: "CSSTimelineScopeGlobal",
depends_on: ["CSSTreeScopedScrollTimeline"],
status: "experimental",
},
{
// Support tree-scoped scroll and view timeline names according to the
// CSSWG resolution on tree-scoped references.
name: "CSSTreeScopedScrollTimeline",
status: "experimental",
},
{
// CSS URL request modifiers: cross-origin(), integrity(),
// referrer-policy() inside url() functions.
//
// https://drafts.csswg.org/css-values-5/#request-url-modifiers
name: "CSSURLRequestModifiers",
status: "stable",
},
// Support for `user-select:contain`.
{
name: "CSSUserSelectContain",
status: "test",
},
{
// https://crbug.com/488305665: Support :user-valid/:user-invalid for radio buttons.
// This lands in M147, and the flag can be removed in M149.
//
// https://drafts.csswg.org/selectors-4/#user-valid-pseudo
name: "CSSUserValidAndUserInvalidForRadio",
status: "stable",
},
{
name: "CSSVideoDynamicRangeMediaQueries",
status: "experimental",
},
{
// https://chromestatus.com/feature/4850737974345728
name: "CSSViewTransitionAutoName",
status: "experimental",
},
{
name: "CSSWindowDrag",
status: "stable",
},
{
// CSSWG resolution to make the `zoom` property continuously
// interpolatable. https://github.com/w3c/csswg-drafts/issues/10872
// Ship in M150, should be removed in M152.
// ChromeStatus: https://chromestatus.com/feature/5183671737909248
name: "CSSZoomAnimation",
status: "stable",
},
{
// Shipping in M148 (or backported earlier), can be removed in M150.
name: "CustomElementsDisableFormattingFixups",
status: "stable",
},
{
// appearance:base for the <datalist> element when it is invoked as a
// picker from an <input type=text>.
// https://issues.chromium.org/issues/453705243
// https://chromestatus.com/feature/5067156794507264
name: "CustomizableCombobox",
status: "experimental",
depends_on: ["AppearanceBase"],
},
{
// appearance:base-select for <select multiple size=1> with a picker.
name: "CustomizableSelectMultiplePopup",
status: "experimental",
},
{
// Adds new UA styles for customizable select from CSSWG discussions.
// https://chromestatus.com/feature/6270612585709568
name: "CustomizableSelectNewUAStyles",
status: "experimental",
},
// see crbug.com/341313078
{
name: "CustomScrollbarApplyMinimumThumbLength",
status: "stable",
},
{
// https://chromestatus.com/feature/5134293578285056
name: "Database",
},
{
// https://crbug.com/473454959
name: "DateTimeInputTypeEarlyAdvanceFix",
status: "stable",
},
// https://crbug.com/448174611
{
name: "DeclarativeCSSModules",
status: "experimental",
origin_trial_feature_name: "DeclarativeCSSModules",
},
// https://crbug.com/448174611
{
name: "DeclarativeCSSModulesStyleTag",
status: "experimental",
},
{
name: "DeclarativeFragment",
status: "experimental",
depends_on: ["DocumentPatching"],
},
{
name: "DeclarativePerformanceObserver",
origin_trial_feature_name: "DeclarativePerformanceObserver",
status: "experimental",
// base_feature is meant as kill-switch. This runtime-enabled feature
// should follow the Origin Trial unless explicitly overriden by Finch or
// commandline flags.
base_feature_status: "enabled",
// Enables the Blink feature only when the base::Feature is overridden by
// field trial or command line.
copied_from_base_feature_if: "overridden",
},
{
name: "DeclarativeSkeletons",
status: "test",
},
{
// Declarative WebMCP: tools declared via HTML <form> attributes
// (`toolname`, `tooldescription`, ...), and the associated CSS
// pseudo-classes and SubmitEvent extensions. It builds on top of the
// imperative `WebMCP` feature (`document.modelContext`).
//
// This shares the "WebMCP" origin trial with imperative WebMCP, so that
// declarative WebMCP keeps working for origin trial participants, while
// still being independently controllable (e.g. kill-switchable) through
// its own base feature. Declarative WebMCP builds on the imperative
// infrastructure, so C++ callers should use
// ModelContext::IsDeclarativeWebMCPEnabled(), which also requires
// `WebMCP` to be enabled (and thus honors the kWebMCP kill switch).
// `depends_on` can't be used here since depending on an origin trial
// feature is not supported.
//
// Overriding the kWebMCP base feature (e.g. --enable-features=WebMCP)
// also sets this feature; see content/child/runtime_features.cc. An
// explicit kDeclarativeWebMCP override takes precedence.
name: "DeclarativeWebMCP",
origin_trial_feature_name: "WebMCP",
origin_trial_allows_third_party: true,
public: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
implied_by: [
"WebMCPDeclarativeFileInput",
"WebMCPFormAssociatedCustomElements"
],
status: "experimental",
},
{
name: "DeferLineBoxHitTestToBackground",
status: "stable",
},
{
// Killswitch for https://crbug.com/400317114 fix.
// This lands in M142, and the flag can be removed in M144.
name: "DelegatesFocusTextControlInputFix",
status: "stable",
},
// This allows pages to opt out of the unload deprecation. Enabling this
// allows unload event handers to be used in the frame regardless of any
// Permissions-Policy setting.
// https://crbug.com/1432116
{
name: "DeprecateUnloadOptOut",
origin_trial_feature_name: "DeprecateUnloadOptOut",
origin_trial_type: "deprecation",
origin_trial_allows_third_party: true,
origin_trial_allows_insecure: true,
},
{
name: "DesktopCaptureDisableLocalEchoControl",
status: "experimental",
},
{
name: "DesktopPWAsAdditionalWindowingControls",
status: {
"ChromeOS": "stable",
"default": "experimental",
},
},
{
name: "DesktopPWAsAdditionalWindowingControlsOnMove",
status: "experimental",
},
{
name: "DeviceAttributes",
status: {
"ChromeOS": "stable",
"default": "experimental",
},
},
{
name: "DeviceOrientationRequestPermission",
status: "stable",
},
{
name: "DevicePosture",
status: "stable",
},
{
// crbug.com/520262209: This feature makes the <dialog> element close
// properly when its "open" attribute is removed. See
// - https://github.com/whatwg/html/issues/5802
// - https://github.com/whatwg/html/pull/10124
name: "DialogCloseWhenOpenRemoved",
status: "experimental",
},
{
name: "DialogNewFocusBehavior",
status: "experimental",
},
{
name: "DigitalCredentialsProtocolFilter",
status: "experimental",
},
{
name: "DigitalGoods",
origin_trial_feature_name: "DigitalGoodsV2",
origin_trial_os: ["android", "chromeos"],
public: true,
status: {
"Android": "stable",
"ChromeOS": "stable",
// crbug.com/1143079: Web tests cannot differentiate ChromeOS and Linux,
// so enable the API on all platforms for testing.
"default": "test"
},
base_feature: "none",
},
{
name: "DigitalGoodsV2_1",
status: {
"Android": "stable",
"ChromeOS": "stable",
// crbug.com/1143079: Web tests cannot differentiate ChromeOS and Linux,
// so enable the API on all platforms for testing.
"default": "test"
},
},
{
name: "DirectSockets",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
browser_process_read_write_access: true,
},
{
// Experimental support for the Direct Sockets API in Service Workers.
// https://github.com/WICG/direct-sockets
name: "DirectSocketsInServiceWorkers",
},
{
// Experimental support for the Direct Sockets API in Shared Workers.
// https://github.com/WICG/direct-sockets
name: "DirectSocketsInSharedWorkers",
},
{
name: "DisableAnchorCenterOnAlignJustifyItems",
status: "stable",
},
{
name: "DisableDifferentOriginSubframeDialogSuppression",
base_feature: "none",
origin_trial_feature_name: "DisableDifferentOriginSubframeDialogSuppression",
origin_trial_type: "deprecation",
origin_trial_allows_insecure: true,
},
{
// Switch from ellipsis to clip when a container is scrolled.
// This shipped in M146 and the flag can be removed in M148.
name: "DisableEllipsisWhenScrolled",
status: "experimental",
},
{
// Prevents the change event from being fired within
// HTMLFieldSetElement::ChildrenChanged because we aren't supposed to
// fire events during mutations like that.
// https://issues.chromium.org/issues/523756329
// https://issues.chromium.org/issues/523748081
// https://issues.chromium.org/issues/523737685
// Enabled in 151, safe to remove in 153.
name: "DisableFormControlChangeEventDuringMutation",
status: "stable",
},
{
name: "DisconnectWebSocketOnBFCache",
status: "stable",
},
{
// `kHidden` and `kHiddenButPainting` visibility states are treated as
// hidden in the sense of `document.visibilityState`. However, they are
// handled differently internally. For example, video playback should
// continue in `kHiddenButPainting`, such as when the page is being
// background captured. When enabled, this feature causes blink to
// notify internal observers about visibility changes between the two
// hidden states, in addition to transitions to/from `kVisible`.
//
// Since the two hidden states are exposed to the web identically, there
// is no `visibilitychanged` event fired when switching between them.
//
// When this feature is disabled, blink reverts to its original behavior
// of eliding transitions between the two hidden states, including to
// internal observers. This behavior causes problems with capture and
// picture-in-picture, but is preserved as a safe fallback.
name: "DispatchHiddenVisibilityTransitions",
status: "stable",
base_feature: "DispatchHiddenVisibilityTransitions",
},
{
// Dispatch selectionchange event per element according to the new spec:
// https://w3c.github.io/selection-api/#selectionchange-event
name: "DispatchSelectionchangeEventPerElement",
status: "stable",
},
{
// Dispatches a securitypolicyviolation event for CSP violations
// detected while fetching a worker's or worklet's module graph
// (top-level script, redirects, and nested static imports).
// See https://crbug.com/40612680
name: "DispatchWorkerCSPViolationEventForModuleGraphFetching",
status: "experimental",
},
{
// Allowing elements with display:contents to have focus.
// See https://crbug.com/1366037
name: "DisplayContentsFocusable",
status: "experimental",
},
{
name: "DisplayCutoutAPI",
base_feature: "none",
public: true,
// There is an override later to ensure this is only enabled for
// Android P+.
status: { "Android": "stable" },
},
{
name: "DocumentCookie",
},
{
name: "DocumentDomain",
},
{
// Enables DocumentIsolationPolicy.
// See https://https://github.com/WICG/document-isolation-policy.
name: "DocumentIsolationPolicy",
status: "experimental",
origin_trial_feature_name: "DocumentIsolationPolicy",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
base_feature: "none",
},
{
// Kill switch for including non-exposed <object> and <embed> elements in
// document named properties. crbug.com/551807991
// Lands in M155 and can be removed in M157.
name: "DocumentNamedPropertiesIgnoreExposedness",
status: "stable",
},
{
// Fix iframe unload events not firing during document.open()
// https://crbug.com/40947017
// Lands in M144; remove this flag in M146 after the milestone rolls.
name: "DocumentOpenIframeUnloadEvents",
status: "stable",
},
{
name: "DocumentOpenOriginAliasRemoval",
status: "experimental",
copied_from_base_feature_if: "overridden",
},
{
name: "DocumentOpenSandboxInheritanceRemoval",
status: "stable",
copied_from_base_feature_if: "overridden",
},
// https://chromestatus.com/feature/5111042975465472
// <template patchfor> etc.
{
name: "DocumentPatching",
status: "stable",
},
{
name: "DocumentPictureInPictureAPI",
status: {
"Android": "",
"default": "stable",
},
},
// Enables `preferInitialWindowPlacement` Document PiP option to skip
// re-using the previous pip window bounds.
{
name: "DocumentPictureInPicturePreferInitialPlacement",
status: {
"Android": "",
"default": "stable",
},
},
// Enables propagating user activation from a document picture-in-picture
// window up to its opener window and vice versa.
{
name: "DocumentPictureInPictureUserActivation",
status: {
"Android": "",
"default": "stable",
},
},
// Enables the ability to use Document Policy header to control feature
// DocumentDomain.
{
name: "DocumentPolicyDocumentDomain",
status: "experimental",
},
// Enables the ability to use Document Policy header to control feature
// ExpectNoLinkedResources.
{
name: "DocumentPolicyExpectNoLinkedResources",
status: "stable",
},
// Enables the ability to use Document Policy header to control feature
// IncludeJSCallStacksInCrashReports. https://chromestatus.com/feature/4731248572628992
{
name: "DocumentPolicyIncludeJSCallStacksInCrashReports",
status: "stable",
},
// Enables Document Policy for DedicatedWorkers.
{
name: "DocumentPolicyInDedicatedWorker",
status: "experimental",
},
{
name: "DocumentPolicyJSProfilingMode",
status: "experimental",
},
{
name: "DocumentPolicyNegotiation",
origin_trial_feature_name: "DocumentPolicyNegotiation",
public: true,
status: "experimental",
base_feature: "none",
},
// Enables the ability to use Document Policy header to control feature
// NetworkEfficiencyGuardrails. https://chromestatus.com/feature/5156240166223872
{
name: "DocumentPolicyNetworkEfficiencyGuardrails",
status: "experimental",
},
// Enables the ability to use Document Policy header to control feature
// SyncXHR.
{
name: "DocumentPolicySyncXHR",
status: "experimental",
},
{
name: "DocumentWrite",
},
{
// Kill switch for marking scripts parsed by DOMParser in XML documents as
// "already started" so they stay inert when cloned or imported.
// https://crbug.com/542115030
name: "DOMParserXmlScriptAlreadyStarted",
status: "stable",
},
{
// https://chromestatus.com/feature/4909387902746624
// Enables dragging multiple files out of a web page via the
// DownloadURL-list drag type.
name: "DragAndDropDownloadURLList",
public: true,
status: "test",
},
{
// Enables JS-constructed File objects (e.g. new File([bytes], 'photo.jpg'))
// to carry their blob contents through the drag-and-drop pipeline.
// When disabled, only the filename is sent as text/plain (legacy behavior).
name: "DragAndDropJSFileObjects",
status: "test",
},
{
// When enabled, drag image previews are generated for images regardless
// of their intrinsic size (the output is still clamped to
// MaxDragImageSize). When disabled, images whose intrinsic area exceeds
// kMaxOriginalImageArea produce no drag preview (legacy behavior). Acts
// as a kill switch for the removal of that cap. See
// https://crbug.com/518266739
name: "DragImageForLargeImages",
status: "stable",
},
{
// See: crrev.com/c/7874048
// Diagnostic flag to gather data for a case when compositable animations lack snapshots without a known reason.
name: "DumpForAbsentKeyframeSnapshots",
},
{
// See https://crbug.com/443612843
name: "EditContextAssignmentAsPerSpec",
status: "test"
},
{
// Schedule a main frame when EditContext.updateControlBounds() or
// updateSelectionBounds() changes the bounds of the active EditContext,
// so the new bounds are sent to the browser in TextInputStateChanged even
// when called from an async task that doesn't otherwise cause a frame.
name: "EditContextBoundsUpdateSchedulesFrame",
status: "stable",
},
{
// Support code point-based deletion calculations in
// DeleteSurroundingTextInCodePoints() for EditContext.
name: "EditContextCodePointDeletion",
status: "stable",
},
{
// See https://crbug.com/379170477
name: "EditContextHandleTextOrSelectionUpdateDuringComposition",
status: "test",
settable_from_internals: true
},
{
// Update EditContext selectionStart/End before TextUpdateEvent while
// handling deletion. See https://crbug.com/529413105
name: "EditContextSelectionUpdateBeforeTextUpdateEvent",
status: "stable",
},
{
name: "EditingUseDomPositionApi",
status: "test",
},
{
// Elastic overscroll requires even solid color background to be painted
// in the border box space to ensure they aren't shifted away.
name: "ElasticOverscrollBackgroundPaintLocationFix",
status: "stable",
},
{
// Uses the original event delta to choose the initial elastic overscroll
// axis.
name: "ElasticOverscrollUseEventDeltaForAxisSelection",
status: "stable",
},
{
public: true,
name: "ElementCapture",
status: {"Android": "experimental", "iOS": "", "default": "stable"},
},
{
// ElementInternals.behaviors allows web authors to attach
// platform-provided behaviors to custom elements, enabling
// them to adopt native behaviors without extending native
// elements.
// crbug.com/486928684
// https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/PlatformProvidedBehaviors/explainer.md
name: "ElementInternalsBehaviors",
status: "experimental",
},
{
name: "ElementMatchContainer",
status: "test",
},
{
// When enabled, the readonly attribute will prevent constraint validation
// only in some cases, depending on the element.
// This was added in M147 and can be removed after M149.
// https://issues.chromium.org/issues/486228104
name: "ElementSpecificReadOnlyConstraintValidation",
status: "stable",
},
{
name: "EmailVerificationProtocol",
public: true,
origin_trial_feature_name: "EmailVerificationProtocol",
origin_trial_allows_third_party: true,
origin_trial_os: ["win", "mac", "linux", "chromeos", "android"],
status: "experimental",
base_feature: "none",
browser_process_read_access: true,
},
{
// This was added in M151 and can be removed after M153.
// https://issues.chromium.org/issues/525074815
name: "EmbeddedContentCenterAlignBaseline",
status: "stable",
},
{
// Kill switch for https://crbug.com/41384307.
name: "EmojiZWJVerticalOrientation",
status: "stable",
},
{
// Controls whether XSLT processing is selectively re-enabled for
// Common Alerting Protocol (CAP) alert XML documents when native XSLT
// is otherwise disabled.
// crbug.com/435623334.
name: "EnableXSLTForCAPAlerts",
status: "stable",
},
{
name: "EndpointInclusiveCommitStyles",
status: "stable",
},
{
name: "EnforceAnonymityExposure",
status: "stable",
},
// When enabled, the LCP algorithm ignores image entropy for the first
// video frame. See crbug.com/434659232.
{
name: "EntropyIgnoredForFirstVideoFrameLCP",
status: "experimental",
},
{
// `event.pseudoTarget` property to represent pseudo-elements in events. Returns `CSSPseudoElement` or null.
name: "EventPseudoTargetProperty",
status: "stable",
depends_on: ["CSSPseudoElementInterface"],
},
{
name: "EventPseudoTargetViewTransitionName",
status: "stable",
},
{
// Kill-switch for https://chromestatus.com/feature/5153386492198912
// Added in M144, can be removed in M146.
name: "EventTimingInteractionCount",
status: "stable",
},
// Interoperable dispatch timing for transitionrun and media query events.
// https://chromestatus.com/feature/6312504658624512
{
name: "EventTimingMatchingHTML",
status: "stable",
},
{
name: "EventTimingTargetSelector",
status: "experimental",
},
{
// https://drafts.csswg.org/web-animations-2/#triggers
name: "EventTrigger",
status: "experimental",
},
{
name: "ExperimentalContentSecurityPolicyFeatures",
status: "experimental",
base_feature: "none",
},
{
name: "ExperimentalJSProfilerMarkers",
origin_trial_feature_name: "JSSelfProfilingMarkers",
status: "experimental",
},
{
name: "ExperimentalMachineLearningNeuralNetwork",
// Enabled by webnn::mojom::features::kExperimentalWebMachineLearningNeuralNetwork.
base_feature: "none",
},
{
name: "ExperimentalPolicies",
status: "experimental",
},
{
name: "ExposeCSSFontFeatureValuesRule",
status: "stable",
},
{
name: "ExposeRenderTimeNonTaoDelayedImage",
},
{
name: "ExtendedTextMetrics",
origin_trial_feature_name: "ExtendedTextMetrics",
origin_trial_allows_third_party: true,
status: "experimental",
},
{
name: "ExtensionScriptTagging",
public: true,
status: "stable",
base_feature: "ExtensionScriptTagging",
},
{
name: "ExtensionScriptTaggingTestingAPI",
base_feature: "ExtensionScriptTaggingTestingAPI",
},
{
// Kill-switch for crbug.com/40434449.
// Added in M139, and it can be removed in M141.
name: "ExternalPopupMenuClickEvent",
status: "stable",
},
{
name: "EyeDropperAPI",
status: {
// EyeDropper UI is available on ChromeOS, Linux (x11), Mac, and Win.
// This list should match the supported operating systems for the
// kEyeDropper base::Feature.
"ChromeOS": "stable",
"Linux": "stable",
"Mac": "stable",
"Win": "stable",
},
// When running under experimental platform variants, such as
// Linux/Wayland, EyeDropper base::Feature defined in the browser
// process is used to disable it at runtime, if needed.
base_feature: "none",
public: true,
},
{
name: "FaceDetector",
status: "experimental",
},
{
name: "FastPositionIterator",
// Not enabled due to a RTL issue. crbug.com/1421016.
},
{
name: "FedCm",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "FedCmActiveModeMultipleIdentityProviders",
depends_on: ["FedCmMultipleIdentityProviders"],
status: "experimental",
base_feature: "none",
public: true,
},
{
name: "FedCmAutofill",
implied_by: ["FedCmDelegation"],
public: true,
status: "test",
base_feature: "none",
},
{
name: "FedCmDelegation",
depends_on: ["FedCm"],
public: true,
status: "test",
base_feature: "none",
},
{
name: "FedCmIdentityHandler",
depends_on: ["FedCm"],
public: true,
status: "test",
base_feature: "none",
},
{
name: "FedCmIdPRegistration",
depends_on: ["FedCm"],
public: true,
status: "test",
base_feature: "none",
},
{
name: "FedCmLightweightMode",
depends_on: ["FedCm"],
status: "test",
public: true,
base_feature: "none",
},
{
name: "FedCmMultipleIdentityProviders",
depends_on: ["FedCm"],
status: "stable",
base_feature: "none",
public: true,
origin_trial_feature_name: "FedCmMultipleIdentityProviders",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
origin_trial_allows_third_party: true,
},
{
name: "FedCmMultipleRequests",
depends_on: ["FedCm"],
status: "stable",
public: true,
base_feature: "none",
},
{
name: "FedCmNavigationInterception",
depends_on: ["FedCm"],
public: true,
base_feature: "none",
},
{
name: "FencedFrames",
base_feature: "none",
// This helps enable and expose the <fencedframe> element, but note that
// blink::features::kFencedFrames must be enabled as well, as we require
// the support of the browser process to fully enable the feature.
// Enabling this runtime enabled feature alone has no effect.
public: true,
status: "stable",
},
{
name: "FencedFramesAPIChanges",
// Various new IDL attributes on the <fencedframe> element (such as
// `config`, `sandbox`, and `allow`).
base_feature_status: "enabled",
copied_from_base_feature_if: "enabled_or_overridden",
status: "stable",
},
{
// Allows fenced frames to access unpartioned data via Shared Storage in
// exchange for disabling untrusted network access. This is the Blink
// counterpart of the base::Feature with the same name. Because local
// unpartitioned data access requires browser and renderer process
// coordination, the value of this flag is strictly controlled by the
// base::Feature variant, and setting this flag does nothing.
name: "FencedFramesLocalUnpartitionedDataAccess",
base_feature: "none",
public: true,
},
{
// Add Request.bytes() and Response.bytes()
// https://chromestatus.com/feature/5239268180754432
name: "FetchBodyBytes",
status: "stable",
},
{
// The Blink runtime-enabled feature name for the API's IDL.
// https://chromestatus.com/feature/4654499737632768
name: "FetchLaterAPI",
status: "stable",
},
{
// The retry ability for Fetch keepalive requests.
// https://chromestatus.com/feature/5181984581877760
name: "FetchRetry",
origin_trial_feature_name: "FetchRetry",
origin_trial_allows_third_party: true,
status: "experimental",
base_feature: "FetchRetry",
// base_feature is meant as kill-switch. This runtime-enabled feature
// should follow the Origin Trial unless explicitly overriden by Finch or
// commandline flags.
base_feature_status: "enabled",
// Enables the Blink feature only when the base::Feature is overridden by
// field trial or command line.
copied_from_base_feature_if: "overridden",
browser_process_read_access: true,
},
{
name: "FetchUploadStreaming",
status: "stable",
},
{
// Also enabled when blink::features::kFileHandlingAPI is overridden
// on the command line (or via chrome://flags).
name: "FileHandling",
depends_on: ["FileSystemAccessLocal"],
status: {"Android": "test", "default": "stable"},
base_feature: "FileHandlingAPI",
},
{
// For <input type=file>, fires change event when same file is chosen
// again, and retains files when cancel is pressed.
name: "FilePickerEventsFix",
status: "stable",
},
{
name: "FileSystem",
public: true,
status: "stable",
base_feature: "none",
},
{
// Shared objects by OPFS and non-OPFS File System Access API.
name: "FileSystemAccess",
implied_by: ["FileSystemAccessLocal", "FileSystemAccessOriginPrivate"],
},
{
// In-development features for the File System Access API.
name: "FileSystemAccessAPIExperimental",
status: "experimental",
},
{
// The FileSystemHandle.getCloudIdentifiers() method (see
// crbug.com/1443354).
name: "FileSystemAccessGetCloudIdentifiers",
status: {
"ChromeOS": "experimental",
"default": "",
}
},
{
// Non-OPFS File System Access API.
name: "FileSystemAccessLocal",
status: {"default": "stable"},
},
{
name: "FileSystemAccessLockingScheme",
status: "stable",
},
{
// OPFS File System Access API.
name: "FileSystemAccessOriginPrivate",
status: "stable",
},
{
// When enabled, calling remove() on a FileSystemAccessHandle will also
// update the permission grants for the associated path. Restored after
// next write to the path.
// See crbug.com/421690393.
name: "FileSystemAccessRevokeReadOnRemove",
depends_on: ["FileSystemAccessWriteMode"],
status: "stable",
},
{
// Controls the internal write-only mode for various FileSystemAccess API.
// This covers mostly content layer and does not expose any write mode to
// user visible APIs.
// This flag is part of crbug.com/421690393 and crbug.com/328458680.
name: "FileSystemAccessWriteMode",
status: "stable",
},
{
// The FileSystemObserver interface for the File System Access API.
// See https://crbug.com/1019297.
name: "FileSystemObserver",
depends_on: ["FileSystemAccess"],
status: {
"Android": "",
"iOS": "",
"default": "stable",
},
},
{
// The unobserve function of the FileSystemObserver.
// See https://crbug.com/321980469.
name: "FileSystemObserverUnobserve",
status: "experimental",
},
{
// Adds the filter attribute to the input element, which targets a
// listbox select element to perform filtering.
name: "FilterableSelect",
status: "experimental",
},
{
// Fix for https://crbug.com/41153707
name: "FilterContainerLevelStyles",
status: "stable"
},
{
// Enables the beforefilter event and the option.filtered IDL, which are
// shared primitives needed by both the FilterableSelect and
// CustomizableCombobox features.
name: "FilteringPrimitives",
implied_by: ["FilterableSelect", "CustomizableCombobox"],
},
{
name: "FindBufferCollapseSkippedSpace",
status: "stable",
},
{
name: "FindBufferMatchAcrossIgnoredNodes",
status: "stable",
},
{
// Fix for https://crbug.com/558819236
name: "FindBufferSkipIgnoredSubtrees",
status: "stable",
},
{
name: "FindFirstMisspellingEndWhenNonEditable",
status: "stable",
},
{
// crbug.com/553136688 and crbug.com/553252820
name: "FindIgnoreSuggestionFix",
status: "stable",
},
{
// https://github.com/w3c/csswg-drafts/issues/13926
name: "FirstLineAndLetterExcludeInputTextarea",
status: "stable",
},
{
// It turned out that this fix was wrong. The plan is to turn it off, and
// remove if that goes well. crbug.com/41362700
name: "FirstLineTextMetrics",
},
// When enabled, HTMLFormControlElement::IsReadOnly() returns false for
// types that don't support readonly.
{
name: "FixHTMLFormControlElementIsReadOnly",
status: "stable",
},
{
// Fix a bug in the <map> element's caching of the name attribute. This
// flag was added in M148, and can be removed in M150.
name: "FixMapElementEmptyNameBug",
status: "stable",
},
{
// Guard the kStart / kEnd / kStartAndEnd branches of
// LayoutSelection::ComputeSelectionStatus against std::nullopt
// start_offset / end_offset in SelectionPaintRange.
// See https://crbug.com/489028874
name: "FixSelectionPaintRangeNullOpt",
status: "stable",
},
// Fix LayoutView viewport mapping in the GeometryMapper fast path for
// OOPIFs.
{
name: "FixVisualRectRemoteViewportTransform",
status: "stable",
},
{
name: "Fledge",
public: true,
},
{
// Enables deal support within auctions.
name: "FledgeAuctionDealSupport",
status: "test",
},
{
name: "FledgeBiddingAndAuctionServerAPI",
origin_trial_feature_name: "FledgeBiddingAndAuctionServer",
origin_trial_allows_third_party: true,
base_feature: "none",
status: "stable",
},
{
name: "FledgeBiddingAndAuctionServerAPIMultiSeller",
status: "stable",
},
{
name: "FledgeClickiness",
status: "test",
},
{
name: "FledgeCustomMaxAuctionAdComponents",
status: "stable",
},
{
// Enables using a 'deprecatedRenderURLReplacements' field within the
// Protected Audience ad auction config.
name: "FledgeDeprecatedRenderURLReplacements",
public: true,
status: "stable",
},
{
name: "FledgeDirectFromSellerSignalsHeaderAdSlot",
status: "stable",
},
{
// Feature flag to control removal, in case we run into unexpected
// breakage.
//
// TODO(crbug.com/384481095): Remove in a few milestones, along with the
// implementation code.
name: "FledgeDirectFromSellerSignalsWebBundles",
},
{
name: "FledgeMultiBid",
public: true,
status: "stable",
},
{
// Enables the private model training API in Protected Audience.
// https://github.com/WICG/turtledove/blob/main/PA_private_model_training.md
name: "FledgePrivateModelTraining",
status: "test",
},
{
// Enables real time reporting API in Protected Audience.
// https://github.com/WICG/turtledove/blob/main/PA_real_time_monitoring.md
name: "FledgeRealTimeReporting",
public: true,
status: "stable",
},
{
// Enables the ability to set seller nonces on the header response and
// use bidNonce in bids.
name: "FledgeSellerNonce",
status: "stable",
},
{
// Enables having `executionMode` in the auctionConfig to use for seller scripts.
name: "FledgeSellerScriptExecutionMode",
status: "test",
},
{
name: "FledgeTrustedSignalsKVv1CreativeScanning",
status: "test",
},
{
name: "FledgeTrustedSignalsKVv2ContextualData",
depends_on: ["FledgeTrustedSignalsKVv2Support"],
status: "test",
},
{
name: "FledgeTrustedSignalsKVv2Support",
status: "stable",
},
{
name: "FlexWrapBalance",
status: "stable",
},
{
// https://open-ui.org/components/scoped-focusgroup.explainer/
name: "Focusgroup",
status: "stable",
},
{
// https://open-ui.org/components/focusgroup-v2.explainer/
name: "FocusgroupV2",
depends_on: ["Focusgroup"],
status: "experimental",
},
{
// Fires a "focusreset" event at a Document during "update the rendering"
// when its focused element was removed and focus was not explicitly
// moved since. https://github.com/whatwg/html/pull/13050
name: "FocusResetEvent",
status: "experimental",
},
{
// Respects explicit outline colors for focus rings in dark mode and uses
// an off-white default. https://issues.chromium.org/issues/480978106
name: "FocusRingRespectExplicitOutlineColorInDarkMode",
status: "stable",
},
{
name: "FontAccess",
status: {"Android": "", "default": "stable"},
},
{
name: "FontationsPrinting",
status: "stable",
},
{
name: "FontDataServiceForCSSLocalFonts",
base_feature: "none",
// No status, as the web platform runtime enabled feature is controlled by
// a Chromium level feature (kFontDataServiceForCSSLocalFonts).
},
{
name: "FontFamilyPostscriptMatchingCTMigration",
},
{
name: "FontFamilyStyleMatchingCTMigration",
},
{
// crbug.com/40398871
name: "FontFeatureSettingsDescriptor",
status: "stable",
},
{
name: "FontFormatAvar2",
status: "stable",
},
{
// crbug.com/41170551
name: "FontLanguageOverride",
status: "stable",
},
{
name: "FontMatchAliasesAsLastResort",
status: "stable",
},
{
// Kill switch for https://crbug.com/489865845.
name: "FontPrewarmerShutdownFallback",
status: "stable",
},
{
// crbug.com/393391746
name: "FontStyleObliqueZeroDegreeAsNormal",
status: "stable",
},
{
// crbug.com/325826179
name: "FontUniqueNameTypefaceCache",
status: "stable",
},
{
name: "FontVariableItalicAxis",
status: "stable",
},
{
// crbug.com/40398871
name: "FontVariationSettingsDescriptor",
status: "stable",
},
{
// TODO(crbug.com/1231644): This flag is being kept (even though the
// feature has shipped) until there are settings to allow users to
// customize the feature.
name: "ForcedColors",
public: true,
status: "stable",
base_feature: "none",
},
{
// This is used in tests to perform memory measurement without
// waiting for GC.
name:"ForceEagerMeasureMemory",
},
{
// https://github.com/flackr/reduce-motion/blob/main/explainer.md
name: "ForceReduceMotion",
},
{
// Flag for rolling out the standardized behavior where fetch calls are
// rejected with the reason provided to the abort controller, if one was
// provided. See crbug.com/502133195
name: "ForwardReasonToFetchBodyAbort",
status: "stable",
},
{
name: "FractionalScrollOffsets",
implied_by: ["FractionalScrollOffsetsForWebAPI"],
status: "experimental",
},
{
// https://crbug.com/40384509.
name: "FractionalScrollOffsetsForWebAPI",
},
{
// Generate layout fragments for out-of-flow positioned elements as
// children of their actual containing block - ALSO when inside block
// fragmentation, such as multicol. See crbug.com/40267498
name: "FragmentedOofInCb",
},
{
// crbug.com/570740320
name: "FrameCaretSkipHiddenCheck",
status: "stable",
},
{
name: "FreezeFramesOnVisibility",
status: "experimental",
},
{
name: "GamepadButtonTypes",
status: "experimental",
},
{
name: "GamepadMultitouch",
status: "experimental",
public: true,
},
{
name: "GamepadRawInputChangeEvent",
status: "experimental",
origin_trial_feature_name: "GamepadRawInputChangeEvent",
base_feature: "none",
public: true,
},
{
name: "GamepadWindowEventHandlers",
status: "stable",
},
{
// When enabled, the drag image overlay for an element will be created
// before the "dragstart" event is fired. This fixes a bug that made
// drags not start if the "dragstart" event caused a layout shift that
// made the mouse hit test miss the drag source.
name: "GenerateDragOverlayBeforeDragStart",
status: "stable",
},
{
// Killswitch for the visible deprecation warning banner shown on
// XSLT-transformed documents. This will be present until the banner is
// removed in M158.
name: "GenerateXSLTWarningBanner",
status: "stable",
},
{
// Tracking bug for the implementation: https://crbug.com/430204832
name: "GeolocationElement",
status: "stable",
public: true,
},
{
// A feature flag that controls whether the geometry mapper singular
// transform fix is enabled.
// https://issues.chromium.org/issues/441128445
name: "GeometryMapperSingularTransformFix",
status: "stable",
},
{
// GeometryUtils mixin.
// https://drafts.csswg.org/cssom-view/#the-geometryutils-interface
name: "GeometryUtils",
status: "experimental",
},
{
// GeometryUtils for CSSPseudoElement interface.
// https://www.w3.org/TR/cssom-view-1/#the-geometryutils-interface
name: "GeometryUtilsForCSSPseudoElement",
depends_on: ["CSSPseudoElementInterface"],
status: "experimental",
},
{
name: "GetAllScreensMedia",
depends_on: ["GetDisplayMedia"],
public: true,
status: {
"ChromeOS": "stable",
"default": "test",
},
},
{
name: "GetDisplayMedia",
public: true,
status: {
"Android": "experimental",
"default": "stable",
},
base_feature: "none",
},
// When a Web application calls getDisplayMedia(), allow a hint to be
// provided as to whether the Web application prefers prioritizing audio
// capture.
//
// https://w3c.github.io/mediacapture-screen-share/#dom-displaymediastreamoptions-audioselection
{
name: "GetDisplayMediaAudioSelection",
depends_on: ["GetDisplayMedia"],
status: "stable",
},
{
name: "GetDisplayMediaRequiresUserActivation",
depends_on: ["GetDisplayMedia"],
status: "experimental",
},
// When a Web application calls getDisplayMedia() and asks for audio,
// allow a hint to be provided as to whether the Web application is
// interested in audio being among the options offered to the user
// on window display surfaces.
//
// https://www.w3.org/TR/screen-capture/#dom-displaymediastreamoptions-windowaudio
{
name: "GetDisplayMediaWindowAudioCapture",
status: "stable",
browser_process_read_write_access: true,
},
{
// To filter only elements in the HTML namespace when calling
// getElementsByName().
// This was added in M141 and can be removed after M143.
// https://issues.chromium.org/issues/40502558
name: "GetElementsByNameOnlyHTMLElements",
status: "stable",
},
{
// Performs retargeting on the output of InputEvent.getTargetRanges() to
// prevent leaking nodes in shadow roots.
name: "GetTargetRangesRetargeting",
status: "stable",
},
{
name: "GetUserMediaEchoCancellationModes",
status: "stable",
},
{
name: "GlobalPrivacyControl",
implied_by: [
"GlobalPrivacyControlApi",
"GlobalPrivacyControlForce"
],
base_feature: "none",
},
{
// Gates the navigator.globalPrivacyControl JavaScript API.
name: "GlobalPrivacyControlApi",
status: "experimental",
},
{
name: "GlobalPrivacyControlForce",
},
{
name: "GraphemeClusterBoundsCheck",
status: "stable",
},
{
name: "GroupEffect",
status: "test",
},
{
name: "HandleShadowDOMInSubstringUtil",
status: "stable",
},
{
name: "HandwritingRecognition",
status: {
"ChromeOS": "stable",
"default": "experimental",
},
},
{
name: "HarfRustShaping",
status: "test",
},
{
name: "HasUAVisualTransition",
status: "stable",
},
// TODO(crbug.com/333628468): Enables the `headingoffset` and
// `headingreset` attributes, which allow for alternate styles of building
// structured headings. This is being actively prototyped, starting ~M136.
// For more see https://github.com/whatwg/html/issues/5033
{
name: "HeadingOffset",
status: "experimental",
},
{
// Kill switch for setting `display: none` on the media controls
// container when it is not needed.
// Lands in M147 and can be removed in M149. https://crbug.com/40591804
name: "HideVideoControlsWhenUnneeded",
status: "stable",
},
{
name: "HighlightsFromPoint",
status: "stable",
},
{
// Fixed https://crbug.com/456164629, so this will be shipped in M150
// and can be removed in M152.
name: "HitTestBorderRadiusForStackingContext",
status: "stable",
},
{
// Use container_transform_state instead of local_transform_state when
// computing z-depth for depth ordering in preserve-3d hit testing.
// Fixes incorrect hit-test results for layers without CSS transforms.
// https://crbug.com/464173566
name: "HitTestContainerTransformStateForPreserve3d",
status: "stable",
},
{
name: "HrefTranslate",
depends_on: ["TranslateService"],
origin_trial_feature_name: "HrefTranslate",
status: "stable",
base_feature: "none",
},
{
name: "HstsTopLevelNavigationsOnly",
status: "experimental",
base_feature: "none",
},
// Extra steps in HTML Agency Adoption algorithm to remove elements from the
// formatting list when the internal loop reached the maximum number of
// iterations. This shipped in M148 and the flag can be removed in M150.
{
name: "HTMLAdoptionAlgorithmNewSteps",
status: "stable",
},
{
// Kill switch for making <area> display:none by default according to the
// HTML rendering specification. https://crbug.com/1231263
name: "HTMLAreaElementDisplayNone",
status: "stable",
},
{
name: "HTMLAreaHreflangType",
status: "test",
},
{
// Kill switch for parsing <body>, <frame> and <iframe> margin attributes
// as pixel lengths per the HTML rendering rules.
// https://crbug.com/554920796
name: "HTMLBodyMarginPixelLength",
status: "stable",
},
// Additional default command/commandfor actions that aren't part of v1 of
// commands. When this flag is disabled only v1 actions (popover and dialog
// defaults) will work.
{
name: "HTMLCommandActionsV2",
status: "test",
},
// Remove support for the <command> element from the HTML parsing logic.
// This shipped in M148 and the flag can be removed in M150.
// https://issues.chromium.org/issues/491158089
// NOTE: when this flag is removed, be sure to also remove "command"
// from third_party/blink/renderer/core/html/html_tag_names.json5.
{
name: "HTMLCommandElementRemoval",
status: "stable",
},
// Adds support for scroll commands such as 'page-up' and 'page-block-end'.
// https://github.com/danielsakhapov/declarative-scroll-commands-for-html-explainer
{
name: "HTMLCommandForScrollCommands",
status: "experimental",
},
{
name: "HTMLElementScrollParent",
status: "experimental",
},
// Adds support for the `::interest-button` pseudo element, which is a sub-
// feature of the interest invokers feature.
// https://open-ui.org/components/interest-invokers.explainer/
{
name: "HTMLInterestForInterestButtonPseudo",
status: "experimental",
},
{
// Prevents the HTMLLinkElement processing model from being invoked when
// attributes are processed but their value doesn't change. See
// https://crbug.com/41436016.
name: "HTMLLinkElementAttributeValueChanges",
status: "stable",
},
{
// Kill switch for ignoring head start tags in the "in head noscript"
// insertion mode. https://crbug.com/40775952
name: "HTMLParserIgnoreHeadInNoscript",
status: "stable",
},
{
// Killswitch for crbug.com/40727112: emit a bogus comment for an
// incomplete markup declaration at end of input instead of dropping the
// rest of the document.
name: "HTMLParserTruncatedMarkupDeclaration",
status: "stable",
},
{
// A flag, just for local testing to make the
// HTML parser yield more often and take longer to resume.
// This helps when debugging flaky tests caused by parser
// yielding heuristics.
name: "HTMLParserYieldAndDelayOftenForTesting",
},
{
name: "HTMLParserYieldByUserTiming",
status: "test",
},
{
// When enabled, specifies visual affordances for printing such as headers,
// footers and page numbers, to be PDF annotations.
// See section 14.8.2.2.1 here for info:
// https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf
name: "HTMLPrintingArtifactAnnotations",
status: "stable",
},
{
// Parse processing instructions in HTML.
name: "HTMLProcessingInstruction",
status: "stable",
},
{
// Enables the switch attribute on <input type="checkbox">.
// https://open-ui.org/components/switch.attribute.explainer/
name: "HTMLSwitchAttribute",
status: "experimental",
},
{
// Use orientation segmentation for hyphenation strings in vertical mixed
// text, so characters such as "+=" render sideways instead of upright.
// https://crbug.com/562849567
name: "HyphenVerticalOrientationFix",
status: "stable",
},
{
name: "ICUCapitalization",
status: "experimental",
},
{
name: "IgnoreLetterSpacingInCursiveScripts",
status: "stable",
},
{
name: "ImageDataPixelFormat",
status: "stable",
},
{
name: "ImageDocumentUseLayoutWidth",
status: "stable",
},
{
// Srcset images respond to viewport/zoom changes by
// re-selecting the best candidate, including for
// x-descriptors.
// https://crbug.com/41385706
name: "ImageSrcsetReselection",
status: "stable",
},
{
name: "ImplicitRootScroller",
public: true,
settable_from_internals: true,
status: {"Android": "stable"},
base_feature: "none",
},
{
name: "IncomingCallNotifications",
origin_trial_feature_name: "IncomingCallNotifications",
origin_trial_os: [ "win" ],
base_feature: "none",
public: true,
},
{
// Support for https://www.w3.org/TR/IFT/. Tracked at
// https://chromestatus.com/feature/5135917565214720.
name: "IncrementalFontTransfer",
status: "test",
},
{
name: "InertElementNonEditable",
status: "stable",
},
{
// If a painting bug no longer reproduces with this feature enabled, then
// the bug is caused by incorrect cull rects.
name: "InfiniteCullRect",
},
{
name: "InheritUserModifyWithoutContenteditable",
status: "stable",
},
{
// See crbug.com/40695399
name: "InlineBlockLineNavigation",
status: "stable",
},
{
// See crbug.com/40910996 crbug.com/569803503
name: "InlineContainingBlockSkipOpaque",
status: "test",
},
{
name: "InlineCursorSkipNonIfc",
status: "stable",
},
{
name: "InlineScriptCacheHint",
status: "experimental",
},
{
// If enabled, and the inner html parser is unable to successfully
// parse, it will log histograms of why it failed. The logging is
// non-trivial.
name: "InnerHTMLParserFastpathLogFailure",
status: "experimental",
},
{
// Text fields leave the inline padding out of their client rect and
// scroll size, matching where they clip their text. Kill switch.
// https://github.com/w3c/csswg-drafts/issues/13502
name: "InputClientRectWithoutInlinePadding",
status: "stable",
},
{
// Prevents running DefaultEventHandler on disabled input elements.
// Enabled in M153, safe to remove in M155.
// https://issues.chromium.org/issues/533188858
name: "InputDisabledHandlerFix",
status: "stable",
},
{
// The HTML parser inserts a </select> end tag before inserting <input>
// when parsing inside of a <select> tag. We want to allow <input> inside
// <select>, but it isn't web compatible enough. This flag allows <input>
// inside <select> but only if there is another open tag in between the
// <input> and the <select>, like <select><div><input>.
// For now, this flag also makes <input> close <select> like it used to
// when the <input> is put directly within an <option> or <optgroup>.
name: "InputInSelect",
status: "experimental",
},
{
name: "InputMultipleFieldsUI",
// No plan to support complex UI for date/time INPUT types on Android and
// iOS.
status: {"Android": "test", "iOS": "test", "default": "stable"},
implied_by: ["InputMultipleFieldsUIWithPointerChecks"],
},
{
// Enables InputMultipleFieldsUI on all platforms by tweaking the inner
// fields to be non-focusable and making the whole input element
// focusable for coarse input devices. When this flag is removed, the
// InputMultipleFieldsUI flag can also be removed.
name: "InputMultipleFieldsUIWithPointerChecks",
},
// Enables the `alpha` and `colorspace` content/IDL attributes on
// <input type=color>, allowing alpha and Display P3 color values.
// https://html.spec.whatwg.org/multipage/input.html#dom-input-colorspace
// https://html.spec.whatwg.org/multipage/input.html#dom-input-alpha
// https://chromestatus.com/feature/5736024861966336
{
name: "InputTypeColorEnhancements",
status: "experimental",
},
// Insert a blockquote before a outer block after creating the blockquote
// when indenting a node whose outer block is a blockquote. See
// https://crbug.com/327665597
{
name: "InsertBlockquoteBeforeOuterBlock",
status: "stable",
},
{
name: "InstalledApp",
public: true,
status: "stable",
base_feature: "none",
},
{
// https://chromestatus.com/feature/5152834368700416
name: "InstallElement",
status: {"Android": "", "default": "test"},
origin_trial_feature_name: "InstallElement",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
public: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "InstallOnDeviceSpeechRecognition",
status: "stable",
},
{
name: "IntegrityPolicyScript",
status: "stable",
base_feature: "none",
public: true,
},
{
// Fixes a bug in the implementation of `interest` and `loseinterest`
// events - they should not be composed events.
// This shipped in M149 and can be removed in M151.
name: "InterestEventsNonComposed",
status: "stable",
},
{
// If enabled, BeginMainFrame will always be requested when there are
// active IntersectionObservers and also active composited animations.
name: "IntersectionObserverCompositedAnimationsForceMainFrames",
status: "stable",
},
{
name: "InvertedColors",
status: "experimental",
},
{
name: "InvisibleSVGAnimationThrottling",
status: "stable",
},
{
name: "JavaScriptCompileHintsPerFunctionMagicRuntime",
status: "experimental",
origin_trial_feature_name: "JavaScriptCompileHintsPerFunctionMagic",
},
{
name: "JavaScriptImportText",
status: "stable",
},
{
name: "JavaScriptSourcePhaseImports",
},
{
name: "KeyboardAccessibleTooltip",
status: "experimental",
base_feature: "none",
},
{
// Checks interactive content using EventPath captured at
// dispatch start instead of current DOM state. This was
// added in M145 and can be removed after M147.
// https://issues.chromium.org/issues/452084024
name: "LabelInteractiveContentCheckBeforeHandler",
status: "stable",
},
{
name: "LangAttributeAwareFormControlUI",
settable_from_internals: true,
},
{
name: "LanguageDetectionAPI",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
"Android": "test",
"default": "",
},
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "LanguageDetectionAPIForWorkers",
public: true,
},
{
name: "LayoutCloneForScrollableOverflowChange",
status: "stable",
},
{
name: "LayoutContainingBlockReturnsBox",
status: "stable",
},
{
name: "LayoutIgnoreMarginsForSticky",
},
{
name: "LayoutOOFCollectInlinesFix",
status: "stable",
},
{
// When enabled, brings chromium into compliance with the resolution of:
// https://github.com/whatwg/html/issues/10671
// This flag can be used to easily revert to the old behavior if the new
// behavior causes breakage; otherwise, it can be removed after M145
// reaches stable.
name: "LazyImageConformantLoadEventTiming",
status: "stable",
},
{
// Enables the loading attribute for video and audio elements,
// allowing lazy loading similar to images.
// https://crbug.com/469111735
name: "LazyLoadVideoAndAudio",
status: "stable",
},
{
// Defers parsing of declaration blocks in inline <style> elements until
// a rule is first matched, the same treatment network-fetched
// stylesheets already get in StyleSheetContents::ParseAuthorStyleSheet.
// Rules that never match never pay for their declarations.
name: "LazyParseInlineStyleSheets",
},
{
// Allow triggering the word suggestion from left click.
// From crbug.com/433209485
name: "LeftClickToHandleSuggestion",
status: {
"Android": "stable"
}
},
{
// Keeps the legacy container attributes (startContainer/endContainer)
// on AbstractRange. These attributes move to a new NodeRange interface
// between AbstractRange and Range/StaticRange. This is forced to the
// inverse of the global OpaqueRange runtime flag in
// content/child/runtime_features.cc. Remove when the OpaqueRange flag is
// removed. crbug.com/421421332
name: "LegacyAbstractRange",
base_feature: "none",
status: "stable",
},
{
// Makes light dismiss for popovers and dialogs use the click event
// instead of pointerdown and pointerup in order to fix light dismiss
// bugs for touch inputs.
// https://issues.chromium.org/issues/408010435
name: "LightDismissFromClick",
status: "stable",
},
{
name: "LineBreakAfterSpaceBeforeOpenTag",
status: "stable",
},
{
name: "LineBreakBidiControlEnter",
status: "stable",
},
{
// Clear stale shaping when a line-breaking retry overflows.
// https://crbug.com/559557312
name: "LineBreakerClearShapeResultOnOverflow",
status: "stable",
},
{
// crbug.com/542686223 crbug.com/568304685
name: "LineBreakerHanKerningEnd",
},
{
// Reverse origin trial allowing sites to opt out of Local Network Access
// restrictions for WebRTC.
name: "LocalNetworkAccessForWebRTCOptOut",
origin_trial_feature_name: "LocalNetworkAccessForWebRTCOptOut",
origin_trial_type: "deprecation",
origin_trial_allows_insecure: true,
base_feature: "none",
},
{
name: "LocalNetworkAccessPermissionPolicy",
base_feature: "none",
// No status because this blink runtime feature doesn't work by itself.
// It's controlled by network::features::kLocalNetworkAccessChecks which
// needs to be enabled to make the whole feature work (see
// crbug.com/394009026).
},
{
name: "LocalNetworkAccessWebRTC",
base_feature: "none",
// No status because this feature is controlled by
// network::features::kLocalNetworkAccessChecks and
// network::features::kLocalNetworkAccessChecksWebRTC.
},
{
name: "LocalNetworkAccessWebSocketsTargetAddressSpace",
status: "experimental",
depends_on: ["WebSocketOptionBag"],
},
{
name: "LockedMode",
status: "test",
// Enabled by features::kLockedMode.
public: true,
},
{
name: "LoginElement",
depends_on: ["FedCm"],
status: "experimental",
base_feature: "none",
},
{
// Enable sourceCharPosition for the invoke-type resolve-promise
// https://issues.chromium.org/issues/381529126
name: "LongAnimationFrameSourceCharPosition",
status: "stable",
},
{
// Enable retrieving sourceLine and sourceColumn in LoAF implementation.
// https://issues.chromium.org/issues/391417815
name: "LongAnimationFrameSourceLineColumn",
status: "test",
implied_by: ["LongAnimationFrameSourceLineColumnInterface"],
},
{
// Add sourceLine and sourceColumn to PerformanceScriptTiming
// https://issues.chromium.org/issues/391417815
name: "LongAnimationFrameSourceLineColumnInterface",
status: "test",
},
{
// Add styleDuration and layoutDuration to
// PerformanceLongAnimationFrameTiming and forcedStyleDuration and
// forcedLayoutDuration to PerformanceScriptTiming
name: "LongAnimationFrameStyleDuration",
origin_trial_feature_name: "LongAnimationFrameStyleDuration",
origin_trial_allows_third_party: true,
status: "experimental",
},
{
// Extends the Long Animation Frame (LoAF) API to Web Workers. Reports a
// long task blocking a worker's event loop as a "long-animation-frame"
// entry, observable from inside the worker. See the loaf-congested-moments
// explainer: https://github.com/WICG/delayed-message-timing
name: "LongAnimationFrameWorker",
status: "test",
},
{
// https://crbug.com/572893186
name: "LongPressHitTestInFrame",
status: "stable",
},
{
// Long press on a link selects the link text instead of bringing up
// context menu. Enabled only on Android AuthView.
name: "LongPressLinkSelectText",
},
{
// Kill-switch for releasing the :active state when a touch long-press is
// lifted, and for making context-menu focus hit tests read-only.
// https://crbug.com/358393574
name: "LongPressReleasesActiveState",
status: "stable",
},
{
// Use LongAnimationFrameMonitor to emit longtask entries
name: "LongTaskFromLongAnimationFrame",
status: "stable",
},
{
name: "MacCharacterFallbackCache",
status: "stable",
},
{
name: "MacDisableCtrlHomeEnd",
status: "stable",
},
{
// Read font weight from the OpenType OS/2 table first during macOS font
// family style matching, falling back to AppKit/CoreText weights if the
// OS/2 table is unavailable. See https://crbug.com/543243014.
name: "MacFontWeightFromOS2",
status: "stable",
},
{
name: "MachineLearningNeuralNetwork",
// Enabled by webnn::mojom::features::kWebMachineLearningNeuralNetwork.
base_feature: "none",
},
{
name: "ManagedConfiguration",
status: "stable",
},
{
name: "ManualText",
public: true,
status: "test",
base_feature: "none",
},
{
// CSS margin-trim property: https://drafts.csswg.org/css-box-4/#margin-trim
name: "MarginTrim",
status: "stable",
},
{
name: "MaskDeserializationTimeForCrossOriginMessages",
status: "stable",
},
{
name: "MaskWaitForAllImages",
status: "stable",
},
{
// Enables MathMLAnchorElement
name: "MathMLAnchorElement",
status: "test",
},
{
// Enables mirroring for stretchy and large MathML operators when
// the text direction is right to left.
name: "MathMLOperatorRTLMirroring",
status: "stable",
},
{
name:"MeasureMemory",
status:"stable",
},
{
name: "MediaCapabilitiesEncodingInfo",
status: "experimental",
},
{
name: "MediaCapabilitiesSpatialAudio",
status: "test",
},
{
name: "MediaCaptionSettingsButton",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
},
},
{
name: "MediaCapture",
status: {"Android": "stable"},
},
{
name: "MediaCaptureBackgroundBlur",
origin_trial_feature_name: "MediaCaptureBackgroundBlur",
status: "experimental",
implied_by: ["MediaCaptureCameraControls"],
base_feature: "none",
},
{
name: "MediaCaptureCameraControls",
status: "experimental",
},
{
name: "MediaCaptureConfigurationChange",
origin_trial_feature_name: "MediaCaptureBackgroundBlur",
status: "experimental",
implied_by: ["MediaCaptureBackgroundBlur"],
base_feature: "none",
},
{
name: "MediaCaptureVoiceIsolation",
status: "experimental",
},
{
name: "MediaControlsExpandGesture",
base_feature: "none",
public: true,
status: { "Android": "stable" },
},
{
name: "MediaControlsOverlayPlayButton",
public: true,
settable_from_internals: true,
status: {"Android": "stable"},
base_feature: "none",
},
{
name: "MediaElementMutedDefaultState",
status: "experimental",
},
{
name: "MediaElementVolumeGreaterThanOne",
},
// Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.
{
name: "MediaEngagementBypassAutoplayPolicies",
base_feature: "none",
public: true,
},
{
name: "MediaLatencyHint",
status: "test",
},
{
name: "MediaPlaybackWhileNotVisiblePermissionPolicy",
status: "stable",
},
{
name: "MediaQueryNavigationControls",
},
{
name: "MediaSession",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "MediaSessionChapterInformation",
status: "stable",
},
{
name: "MediaSourceExperimental",
status: "experimental",
},
{
name: "MediaSourceExtensionsForWebCodecs",
status: "experimental",
base_feature: "none",
origin_trial_feature_name: "MediaSourceExtensionsForWebCodecs",
},
{
name: "MediaStreamTrackProcessorStats",
status: "stable",
},
{
name: "MediaStreamTrackTransfer",
status: "test",
base_feature: "none",
},
{
name: "MediaStreamTrackWebSpeech",
status: {
"Linux": "stable",
"Mac": "stable",
"Win": "stable",
"default": "experimental",
},
},
{
// This feature helps to add memory consumer to NGShapeCache, so that
// the cached shape results would be cleared once exceeding the memory limit.
name: "MemoryConsumerForNGShapeCache",
status: "experimental",
},
{
name: "MenuElements",
status: "experimental",
},
{
// Killswitch M149. Functionality changed in M151.
name: "MergeStickyLayers",
status: "stable",
},
{
name: "MessagePortCloseEvent",
status: "test",
},
// This is enabled by default on Windows only. The only part that's
// "experimental" is the support on other platforms.
{
name: "MiddleClickAutoscroll",
status: "test",
},
// Killswitch for crbug.com/40062462 fix.
{
name: "MixedContentAutoupgradesUseIsMixedContentRestrictedInFrame",
status: "stable",
},
{
name: "MobileLayoutTheme",
},
{
name: "ModifyParagraphCrossEditingoundary",
status: "stable",
},
// Stops caching failed module fetches (network error, non-ok status, or
// MIME type mismatch), so a later import re-fetches instead of reusing the
// failure.
// https://html.spec.whatwg.org/C/#fetch-a-single-module-script
// https://crbug.com/534781954
{
name: "ModuleMapDoNotCacheFailedFetch",
status: "stable",
},
// ModulePreloadReferrer enables modulepreload to send proper referrer
// headers as specified in the HTML spec.
// https://crbug.com/441933555
{
name: "ModulePreloadReferrer",
status: "stable",
},
// https://crbug.com/466888680
{
name: "ModulePreloadStyleJson",
status: "stable",
},
{
name: "MojoJS",
status: "test",
custom_enable_check: "CanEnableMojoJS",
},
// MojoJSTest is used exclusively in testing environments, whereas MojoJS
// may also be used elsewhere.
{
name: "MojoJSTest",
status: "test",
base_feature: "none",
custom_enable_check: "CanEnableMojoJSTest",
},
// Optimization for monospace text.
{
name: "MonospaceGlyphCompaction",
},
// Move the selection to the last position in the list item. See
// https://crbug.com/331841851
{
name: "MoveEndingSelectionToListChild",
status: "stable",
},
{
// https://issues.chromium.org/issues/41015847
// This will be shipped in M151, and it can be removed in M153.
name: "MoveParagraphsPreserveInlineStructure",
status: "stable",
},
{
// Support Nastaliq script. crbug.com/569667449
name: "NastaliqScript",
},
{
name: "NavigateEventDeferCrossDocumentCommit",
status: "experimental",
},
{
name: "NavigationEventTiming",
},
{
// NavigationState class and the :navigation-source CSS pseudo-class.
name: "NavigationSourcePseudoClass",
status: "stable",
implied_by: ["RouteMatching"],
},
{
// Exposes navigation redirect timing (redirectCount, redirectStart and
// redirectEnd) for cross-origin redirect chains when every redirect opts
// in to the navigation's destination origin via Timing-Allow-Origin and
// the navigation is not a no-referrer navigation.
// https://github.com/whatwg/fetch/pull/1931
// https://github.com/whatwg/html/pull/12513
name: "NavigationTimingRedirectTimingViaTAO",
status: "stable",
},
{
// Support <navigation-type-test> and <navigation-phase-test>.
name: "NavigationTypeAndPhase",
status: "experimental",
depends_on: ["RouteMatching"],
},
{
name: "NavigatorContentUtils",
// Android does not yet support NavigatorContentUtils.
status: {"Android": "", "default": "stable"},
},
{
name: "NetInfoConstantType",
},
{
name: "NetInfoDownlinkMax",
public: true,
// Only Android, ChromeOS support NetInfo downlinkMax, type and ontypechange now
status: {
"Android": "stable",
"ChromeOS": "stable",
"default": "experimental",
},
base_feature: "none",
},
{
// See crbug.com/521921832
// Any potential behavioral changes excepting bugfixes from the V2 implementation (including
// changes to when the histogram is reported, like early-outs in Animation::PreCommit) are behind
// this flag, for safety and consistent reporting on the V1 enum while it is still supported.
name: "NewAnimationCompositingChecking",
status: "test"
},
{
// Enhanced reporting to dev-tools of the composited/non-composited state of animations.
name: "NewAnimationDispositionReporting"
},
{
// https://chromestatus.com/feature/5054329641893888
// streamHTML, appendHTML, etc.
name: "NewHTMLSettingMethods",
status: "stable",
depends_on: ["SetHTMLCanRunScripts", "TrustedTypesCreateParserOptions"]
},
{
// Fix for https://crbug.com/482862753
name: "NoExtendSelectionToUserSelectNoneOutOfFlow",
status: "stable"
},
{
// Fix for https://crbug.com/522844903, a regression from
// crrev.com/c/7617189. Gated behind its own flag rather than
// changing NoExtendSelectionToUserSelectNoneOutOfFlow's behavior.
name: "NoExtendSelectionToUserSelectNoneOutOfFlowUnlessEditable",
status: "stable"
},
{
// This turns off all font antialiasing for tests unless it is
// explicitly required and enabled using the
// "--enable-font-antialiasing" flag like in the case of
// "virtual/text-antialias/" virtual test suite.
// crbug.com/339041663
name: "NoFontAntialiasing",
status: "test",
},
{
name: "NoIdleEncodingForWebTests",
status: "test",
},
{
// When copying, a lone space between two inline elements is kept as an
// ordinary breaking space instead of being converted to a non-breaking
// space. Spaces at the selection edges and runs of two or more spaces are
// still converted to non-breaking spaces. See https://crbug.com/448047353
name: "NoNbspForInterElementSpaceOnCopy",
status: "stable",
},
// Doesn't insert empty blockquotes on outdenting a blockquote. See
// https://crbug.com/323960902
{
name: "NonEmptyBlockquotesOnOutdenting",
status: "stable",
},
{
name: "NonEmptyVisibleTextSelectionForTextFragment",
status: "stable",
},
{
// TODO(crbug.com/1426629): This feature enables the deprecated value
// slider-vertical. Disable this feature to stop parsing or allowing these
// values.
// https://drafts.csswg.org/css-ui-4/#appearance-switching
name: "NonStandardAppearanceValueSliderVertical",
status: "stable",
},
{
// Normalizes CRLF and standalone CR to LF in execCommand("insertText")
// for consistent newline handling in contenteditable elements.
// See https://crbug.com/41289410
name: "NormalizeLineEndingsInInsertText",
status: "stable",
},
{
// Dispatch an error event for the cross-origin violation for the worker
// script URL fetching, instead of throwing error synchronously on worker
// construction.
// See https://github.com/whatwg/html/issues/337
name: "NoSynchronousThrowForCrossOriginBlockedWorker",
status: "experimental",
},
{
name: "NotificationConstructor",
// Android won't be able to reliably support non-persistent notifications, the
// intended behavior for which is in flux by itself.
status: {"Android": "", "default": "stable"},
},
// NotificationContentImage is not available in all platforms
// The Notification Center on Mac OS X does not support content images.
{
name: "NotificationContentImage",
public: true,
status: {"Mac": "test", "default": "stable"},
base_feature: "none",
},
{
name: "Notifications",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "NotificationTriggers",
origin_trial_feature_name: "NotificationTriggers",
status: "experimental",
base_feature: "none",
},
{
// Notify selection controller of selection changes even when the new
// selection matches the old selection, keeping the selection state in
// sync. This flag ships in M151 and can be removed in M153.
name: "NotifySelectionControllerOnUnchangedSelection",
status: "stable",
},
{
name: "NumberInputFullWidthChars",
status: "stable",
},
{
name: "OfflineAudioContextIncrementalRendering",
status: "experimental",
},
{
name: "OffscreenCanvasGetContextAttributes",
status: "stable",
},
{
//See crbug.com/512385682
name: "OffsetMappingReuseFullWidthSpaceFix",
status: "stable",
},
{
// Kill switch for a fix to offset-path transform invalidation for
// https://crbug.com/463409688.
name: "OffsetPathTransformUpdateFix",
status: "stable",
},
{
name: "OmitBlurEventOnElementRemoval",
status: "test"
},
{
// iframes send pagehide/unload/visibilitychange when removed.
// This not spec-compliant, but might have web-compat consequences.
// This flag omits firing those events on element removal.
name: "OmitSubframeDetachmentEventsOnRemoval",
},
{
name: "OnDeviceWebSpeechAvailable",
status: "stable",
},
{
name: "OnDeviceWebSpeechQuality",
status: "stable",
},
{
// Skip layout of all out-of-flow positioned elements if side-effects are
// disabled. See DisableLayoutSideEffectsScope.
name: "OofLayoutRequiresSideEffects",
status: "stable",
},
{
// The OpaqueRange interface provides a live AbstractRange subtype
// for encapsulated content within <textarea> and <input> elements.
// "This can be removed in M155. crbug.com/421421332
name: "OpaqueRange",
public: true,
status: "stable",
},
{
// Restrict popover invoker lookup to the same TreeScope as the element.
// This will be shipped in M142, and it can be removed in M144.
// See https://issues.chromium.org/issues/443031270.
name: "OpenPopoverInvokerRestrictToSameTreeScope",
status: "stable",
},
{
// Makes option elements match :enabled or :disabled based on whether
// their ancestor select element is disabled.
// https://github.com/w3c/csswg-drafts/issues/13383
// https://issues.chromium.org/issues/490082172
// Enabled in M149, modified in M151, safe to remove in M153.
name: "OptionDisablednessCheckAncestors",
status: "stable",
},
{
name: "OrientationEvent",
status: {"Android": "stable"},
},
{
name: "OriginAPI",
status: "stable",
},
{
name: "OriginIsolationHeader",
status: "stable",
base_feature: "none",
},
{
name: "OriginPolicy",
status: "experimental",
},
// Define a sample API for testing integration with the Origin Trials
// Framework. The sample API is used in both unit and web tests for the
// Origin Trials Framework. Do not change this flag to stable, as it exists
// solely to generate code used by the sample API implementation.
{
name: "OriginTrialsSampleAPI",
base_feature: "none",
origin_trial_feature_name: "Frobulate",
public: true,
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIBrowserReadWrite",
base_feature: "none",
origin_trial_feature_name: "FrobulateBrowserReadWrite",
browser_process_read_write_access: true,
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
// TODO(yashard): Add tests for this feature.
{
name: "OriginTrialsSampleAPIDependent",
depends_on: ["OriginTrialsSampleAPI"],
base_feature: "none",
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIDeprecation",
base_feature: "none",
origin_trial_feature_name: "FrobulateDeprecation",
origin_trial_type: "deprecation",
origin_trial_allows_insecure: true,
public: true,
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIExpiryGracePeriod",
base_feature: "none",
origin_trial_feature_name: "FrobulateExpiryGracePeriod",
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIExpiryGracePeriodThirdParty",
base_feature: "none",
origin_trial_feature_name: "FrobulateExpiryGracePeriodThirdParty",
origin_trial_allows_third_party: true,
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIImplied",
base_feature: "none",
origin_trial_feature_name: "FrobulateImplied",
implied_by: ["OriginTrialsSampleAPI", "OriginTrialsSampleAPIInvalidOS"],
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIInvalidOS",
base_feature: "none",
origin_trial_feature_name: "FrobulateInvalidOS",
origin_trial_os: ["invalid"],
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPINavigation",
base_feature: "none",
origin_trial_feature_name: "FrobulateNavigation",
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIPersistentExpiryGracePeriod",
base_feature: "none",
origin_trial_feature_name: "FrobulatePersistentExpiryGracePeriod",
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIPersistentFeature",
base_feature: "none",
origin_trial_feature_name: "FrobulatePersistent",
origin_trial_allows_third_party: true,
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIPersistentInvalidOS",
base_feature: "none",
origin_trial_feature_name: "FrobulatePersistentInvalidOS",
origin_trial_allows_third_party: true,
origin_trial_os: ["invalid"],
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIPersistentThirdPartyDeprecationFeature",
base_feature: "none",
origin_trial_feature_name: "FrobulatePersistentThirdPartyDeprecation",
origin_trial_allows_third_party: true,
origin_trial_type: "deprecation",
},
// As above. Do not change this flag to stable, as it exists solely to
// generate code used by the origin trials sample API implementation.
{
name: "OriginTrialsSampleAPIThirdParty",
base_feature: "none",
origin_trial_feature_name: "FrobulateThirdParty",
origin_trial_allows_third_party: true,
},
{
name: "OutlineDrawAutoStyleZeroWidth",
status: "stable",
},
{
// Improves the performance of the global overlay:none!important UA style
// rule by replacing the normal UA style rule with other things which
// result in the same behavior. Added in M147, should be safe to remove
// in M150.
name: "OverlayGlobalRuleRemoval",
status: "stable",
},
{
// Enables the CSS overlay property. When this flag is disabled, top
// layer exit animations will work without the need for using the overlay
// property.
name: "OverlayProperty",
status: "stable",
},
{
// https://chromestatus.com/feature/5261280285949952
name: "OverscrollAreas",
status: "experimental",
origin_trial_feature_name: "OverscrollAreas",
depends_on: ["CSSScrollSnapTypePair"],
},
{
name: "PagePopup",
// Android does not have support for PagePopup
status: {"Android": "", "iOS": "", "default": "stable"},
},
{
name: "PagePopupCopyPaste",
depends_on: ["PagePopup"],
status: "stable",
},
{
name: "PageSwapEvent",
status: "stable",
},
{
name: "PaintCaretAfterInnerEditorPaint",
status: "stable",
},
{
name: "PaintHoldingForIframes",
status: "stable",
},
{
name: "PaintUnderInvalidationChecking",
settable_from_internals: true,
},
{
// PARAKEET ad serving runtime flag/JS API.
name: "Parakeet",
origin_trial_feature_name: "Parakeet",
},
{
name: "PartitionVisitedLinkDatabaseWithSelfLinks",
status: {"iOS": "", "default": "stable"},
},
// This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.
{
name: "PasswordReveal",
},
{
name: "PaymentApp",
public: true,
status: "experimental",
base_feature: "none",
},
{
// https://chromestatus.com/feature/5198846820352000
name: "PaymentLinkDetection",
status: "stable",
},
{
name: "PaymentMethodChangeEvent",
depends_on: ["PaymentRequest"],
status: "stable",
},
// PaymentRequest is enabled by default on Android
{
name: "PaymentRequest",
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "PaymentRequestNonFullyActiveDocumentCheckInvalidStateError",
status: "stable",
},
{
name: "PerformanceManagerInstrumentation",
base_feature: "none",
public: true,
},
{
// Sends custom user timing events in subframes to the browser process.
// crbug.com/467177770 for more details.
name: "PerformanceMarkCustomUserTimingFromSubframe",
status: "experimental"
},
{
// Enables performance.mark('mark_feature_usage'): crbug.com/1517170
name: "PerformanceMarkFeatureUsage",
status: "experimental"
},
{
name: "PeriodicBackgroundSync",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "PerMethodCanMakePaymentQuota",
origin_trial_feature_name: "PerMethodCanMakePaymentQuota",
status: "experimental",
base_feature: "none",
},
{
name: "PermissionsPolicyAPI",
status: "experimental",
},
{
name: "PermissionsPolicyForSharedWorkers",
status: "experimental",
},
{
name: "PermissionsRequestRevoke",
status: "experimental",
},
{
// Enables the <persistentwidget> element, which is like an <iframe> but
// can stay alive without reloading when its opener/embedder navigates
// from one same-origin document to another.
// There are checks for this flag in content/browser, which means that
// setting status to "experimental" would not actually enable this
// feature, it has to be "stable" in order for it to actually get enabled
// in the browser process. Manual and automated tests must pass the
// --enable-features=PersistentWidgetAPI command line flag to the
// browser.
name: "PersistentWidgetAPI",
},
// This is a reverse OT used for a phased deprecation.
// https://crbug.com/918374
{
name: "PNaCl",
base_feature: "none",
origin_trial_feature_name: "PNaCl",
public: true,
},
{
// Flag for enabling the pointer lock API on Android
name: "PointerLockOnAndroid",
"status": "stable",
},
{
// https://crbug.com/404479704
name: "PointerRawUpdateOnlyInSecureContext",
status: "stable",
},
{
// Makes showPopover() throw an exception instead of just logging a console
// message when calling showPopover() within another popover hide/show
// operation. https://crbug.com/527495812
name: "PopoverHintNestedShowException",
status: "stable",
},
{
// Simplifies the behavior and stacking interactions of popover=hint and
// popover=auto. See https://crbug.com/499019927.
// This shipped in M150, was disabled via Finch, and was re-enabled in
// M151. The behavior was tweaked slightly in M153, and milestones
// now happen twice as quickly, so the flag can be removed in M157.
name: "PopoverHintNewBehavior",
status: "stable",
},
{
// Kill switch for requiring and consuming transient user activation in
// the browser process when creating a form-control popup widget,
// guarding against compromised renderers opening popups without a user
// gesture.
// See https://crbug.com/506152584.
name: "PopupWidgetRequiresUserActivation",
status: "stable",
},
{
name: "PositionOutsideTabSpanCheckSiblingNode",
status: "stable",
},
{
// Kill switch for https://crbug.com/448173938 which changes position
// visibility to ignore non-clipping ancestors.
name: "PositionVisibilityIgnoreNonClipAncestors",
status: "stable",
},
{
// Enables the "singular" versions of two values for the CSS
// `position-visibility` property: `anchor-valid` and `anchor-visible`.
// See crbug.com/526682332.
name: "PositionVisibilitySingularValues",
status: "stable",
},
{
name: "PotentialPermissionsPolicyReporting",
status: "stable",
},
{
name: "PreciseMemoryInfo",
base_feature: "none",
public: true,
},
// Adds a web setting to disable CSS ScrollbarColor, ScrollbarWidth, and
// legacy ::-webkit-scrollbar* pseudo-element styling.
{
name: "PreferDefaultScrollbarStyles",
},
// Prefer not using composited scrolling. Composited scrolling will still
// be used if there are other reasons forcing compositing. For consistency,
// any code calling Settings::GetPreferCompositingToLCDTextEnabled() should
// ensure that this flag overrides the setting.
{
name: "PreferNonCompositedScrolling",
settable_from_internals: true,
},
{
name: "PreferredAudioOutputDevices",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
origin_trial_feature_name: "PreferredAudioOutputDevices",
origin_trial_allows_third_party: true,
status: "experimental",
public: true,
},
{
name: "PrefersReducedData",
status: "experimental",
},
{
name: "PrefetchAndPrerenderActivationBeacon",
origin_trial_feature_name: "PrefetchAndPrerenderActivationBeacon",
status: "experimental",
base_feature: "none",
public: true,
},
{
// Used to allow preloading data: URLs with link rel=preload.
// https://crbug.com/348442535
name: "PreloadLinkRelDataUrls",
status: "stable",
},
{
// Kill switch for spec-compliant handling of HTML <image> and SVG/MathML
// foreign content in the HTML preload scanner. Ships in M155 and can be
// removed in M158. https://crbug.com/40728681
name: "PreloadScannerImprovements",
status: "stable",
},
{
name: "PrePaintBoxInvalidatorUsesFragments",
status: "stable",
},
{
// Used to allow chrome://flags to turn off prerendering. (Without using
// the user-facing preloading settings page to turn off other
// preloading.) See https://crbug.com/1494471.
//
// It also has some feature params defined throughout the codebase.
name: "Prerender2",
status: "stable",
},
{
// Used to allow prerender cross-origin iframes with an opt-in response
// header.
// https://chromestatus.com/feature/5112398709129216
// https://crbug.com/440387014
name: "Prerender2CrossOriginIframes",
origin_trial_feature_name: "Prerender2CrossOriginIframes",
},
{
// Used to allow prerender activation by form submission.
// See https://crbug.com/346555939.
name: "PrerenderActivationByFormSubmission",
origin_trial_feature_name: "PrerenderActivationByFormSubmission",
status: "stable",
},
{
name: "PrerenderUntilScript",
public: true,
origin_trial_feature_name: "PrerenderUntilScript",
origin_trial_allows_third_party: true,
status: "experimental",
},
{
name: "Presentation",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "PreserveHtmlEquivalentTagsInTypingStyle",
status: "stable",
},
{
// When enabled, a text control's cached selection is preserved while the
// control is not focused or has a post-layout selection restore pending,
// instead of being refreshed from the live DOM selection. Kill switch
// for https://crbug.com/40884623. This feature ships in M154 and can be
// removed in M156.
name: "PreserveUnfocusedSelectionCache",
status: "stable",
},
{
// When enabled, fixes selection jumping when drag-selecting out of
// a float box boundary.
// See https://crbug.com/41340914
name: "PreventTextSelectionJump",
status: "stable",
},
{
name: "PrivateNetworkAccessNullIpAddress",
status: "experimental",
base_feature: "none",
},
{
name: "PrivateStateTokens",
status: "stable",
base_feature: "none",
public: true,
},
{
// Always allow trust token issuance (so long as the base::Feature
// is enabled). Used for testing; circumvents a runtime check that,
// if this RuntimeEnabledFeature is not present, guarantees the origin
// trial is enabled.
name: "PrivateStateTokensAlwaysAllowIssuance",
public: true,
status: "test",
base_feature: "none",
},
{
name: "ProfilerAPI",
status: "stable",
},
{
// When enabled, dedicated workers can use profiler API
name: "ProfilerAPIForDedicatedWorker",
status: "experimental",
},
// Promisify programmatic scroll methods in Element and Window.
// https://crbug.com/41406914
{
name: "ProgrammaticScrollPromise",
status: "stable",
},
{
// Expose `ProgressEvent` in service workers.
// https://xhr.spec.whatwg.org/#interface-progressevent
// https://crbug.com/332663431
name: "ProgressEventInServiceWorker",
status: "stable",
},
{
// Propagate overscroll-behavior from the root element rather than the
// body element. crbug.com/41453796
name: "PropagateOverscrollBehaviorFromRoot",
status: "stable"
},
{
// Allowing pseudo-elements to have focus.
name: "PseudoElementsFocusable",
status: "stable",
},
{
// Support hit-testing for ::after, ::before, ::marker
// (e.g. for CSSPseudoElement).
name: "PseudoElementsHitTestable",
status: "stable",
},
{
// Support :hover on ::after, ::before, ::marker.
name: "PseudoElementsHoverable",
depends_on: ["PseudoElementsHitTestable"],
status: "experimental",
},
{
name: "PushMessageDataBytes",
depends_on: ["PushMessaging"],
status: "stable",
base_feature: "none",
},
{
name: "PushMessaging",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "PushMessagingSubscriptionChange",
public: true,
status: "experimental",
base_feature: "none",
},
{
// ChromeStatus: https://chromestatus.com/feature/6194847180128256
name: "QuotaExceededErrorUpdate",
status: "stable",
},
{
// Gives a natively painted input[type=radio] a 50% border radius so that
// box-shadow and outline follow the circle the theme paints instead of
// the square border box. See crbug.com/40877887.
name: "RadioButtonCircularBorderRadius",
status: "stable",
},
{
// Sets Range boundaries relative to a sibling node lazily, avoiding the
// O(n) Node::NodeIndex()/NodeTraversal::ChildAt walks so that selectNode()
// is O(1) instead of O(n). See crbug.com/515812864.
name: "RangeBoundaryFastPath",
status: "stable",
},
{
name: "RasterInducingScroll",
status: "stable",
},
{
// Used as a kill switch in case the rate limiting causes issues.
name: "RateLimitPointerLockRequests",
status: "stable",
},
{
// Enables support for a 'min' option in ReadableStream BYOBReader.read(),
// allowing callers to specify the minimum number of bytes to be read into
// the buffer before resolving the read request.
// https://chromestatus.com/feature/6396991665602560
name: "ReadableStreamBYOBReaderReadMinOption",
status: "stable",
},
{
// getType() on a ClipboardItem triggers the
// clipboard read operation, implementing lazy loading for clipboard data.
// Chrome status entry - https://chromestatus.com/feature/5203433409871872
name: "ReadClipboardDataOnClipboardItemGetType",
status: "stable",
},
{
// Enables correct reading-flow ordering when slots are involved.
// This will be shipped in M148, and it can be removed in M150.
// See https://issues.chromium.org/issues/452981723.
name: "ReadingFlowWithSlots",
status: "stable",
},
{
// Enables caret visibility and keyboard selection/navigation for
// readonly text controls (input and textarea).
// https://issues.chromium.org/issues/40801366
name: "ReadOnlyTextControlSelection",
status: "stable",
},
{
// Shipping in M148, revised in M151, so should be removed around M153.
name: "RecheckParentDuringNodeVectorInsertion",
status: "stable",
},
// If enabled, both Accept-Language HTTP header and JavaScript getter will
// be reduced.
{
name: "ReduceAcceptLanguage",
base_feature: "none",
},
// If enabled, the minor version of the User-Agent string will be reduced.
// This User-Agent Reduction feature has been enabled starting from M101,
// but we still keep this flag for future phase tests.
{
name: "ReduceUserAgentMinorVersion",
status: "stable",
},
{
public: true,
name: "RegionCapture",
status: {"Android": "experimental", "iOS": "", "default": "stable"},
},
{
name: "RelatedWebsitePartitionAPI",
base_feature: "none",
// No status because this blink runtime feature doesn't work by itself.
// It's controlled by the corresponding Chromium feature,
// net::features::kRelatedWebsitePartitionAPI, which needs to be
// enabled to make the whole feature work.
},
{
// Kill switch for https://crbug.com/376516545.
// Releases paint holding (deferred compositor commits) early for pages
// that finish parsing and produce a first paint but never reach First
// Contentful Paint (e.g. background-color only pages).
name: "ReleasePaintHoldingWithoutContentfulPaint",
status: "stable",
},
{
name: "RelOpenerBcgDependencyHint",
status: "experimental",
},
{
name: "RemotePlayback",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "RemotePlaybackBackend",
settable_from_internals: true,
status: {
"Android": "stable",
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"default": "experimental"},
},
{
// This feature acts as a kill switch for ISO-2022-JP auto-detection.
// This will be shipped in M139, and it can be removed in M141.
// See https://chromestatus.com/feature/6576566521561088.
name: "RemoveCharsetAutoDetectionForISO2022JP",
status: "stable",
},
{
// Optimize ReplaceChildren() to use RemoveChildren() for batch removal
// instead of looping RemoveChild(). This batches style invalidations
// improving performance.
name: "RemoveChildrenInReplaceChildren",
status: "stable",
},
// After paste operation removes the placeholder <br> tag
// that gets inserted in contenteditable as placeholder for newline
{
name: "RemoveCollapsedPlaceholderForContentEditable",
status: "stable"
},
{
name: "RemoveDanglingMarkupInTarget",
status: "stable",
},
{
name: "RemoveDataUrlInSvgUse",
status: "stable",
},
{
// Remove non-allowlisted event interfaces from document.createEvent().
// This was added in M148 and can be removed after M150.
// https://chromestatus.com/feature/5095987863486464
// https://issues.chromium.org/issues/41228793
name: "RemoveNonAllowlistedCreateEvent",
status: "stable",
},
{
// See https://issues.chromium.org/issues/40779139
name: "RemoveScrollNodeWorkaround",
status: "stable",
},
{
// See https://issues.chromium.org/issues/41311101
name: "RemoveVisibleSelectionInDOMSelection",
status: "test",
},
{
// The renderpriority attribute feature.
// https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md
name: "RenderPriorityAttribute",
},
{
// When enabled, avoids calling RemoveChildren() in
// ReplaceChildrenWithFragment() if the container is already empty.
name: "ReplaceChildrenWithFragmentFastPath",
status: "stable",
},
{
// Kill switch for painting non-SVG replaced normal-flow stacking
// contexts inline with their siblings.
// This was set to experimental due to crbug.com/532229489.
name: "ReplacedNormalFlowStackingInlinePaint",
status: "experimental",
},
{
name: "ReportFirstFrameTimeAsRenderTime",
status: "test",
},
{
name: "ReportLayoutShiftRectsInCssPixels",
status: "stable",
},
{
name: "RequestIsReloadNavigation",
status: "stable",
},
{
name: "ResourceTimingInitiator",
status: "experimental",
},
{
name: "ResourceTimingUseCORSForBodySizes",
status: "test",
},
{
name: "RespectOverscrollBehaviorForScrollBubbling",
status: "stable",
},
{
name: "ResponsiveIframes",
status: "stable",
},
{
name: "RestrictGamepadAccess",
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "RestrictOwnAudio",
status: "stable",
},
{
// If enabled, makes the root scrollbars' foreground elements follow the
// browser
name: "RootScrollbarFollowsBrowserTheme",
status: {"Linux": "test", "Win": "test"},
},
// Route matching, @route CSS rule.
// https://chromestatus.com/feature/4771962874363904
{
name: "RouteMatching",
status: "experimental",
},
{
name: "RtcAlwaysNegotiateDataChannels",
status: "stable",
},
{
name: "RtcAudioJitterBufferMaxPackets",
origin_trial_feature_name: "RtcAudioJitterBufferMaxPackets",
status: "experimental",
base_feature: "none",
},
{
// Non-standard RTCConfiguration.iceTransports alias. Off by default
// (alias removed). Enable via Finch to restore if sites break.
// https://crbug.com/488071544
name: "RTCConfigurationIceTransports",
},
{
name: "RTCDataChannelPriority",
status: "experimental",
},
{
name: "RTCDiagnosticLogging",
origin_trial_feature_name: "RTCDiagnosticLogging",
status: {"Android": "", "default": "stable"},
},
{
name: "RTCEncodedAudioFrameConstructor",
status: "experimental",
},
{
name: "RTCEncodedFrameAudioLevel",
status: "stable",
},
{
name: "RTCEncodedFrameSetMetadata",
status: "experimental",
origin_trial_feature_name: "RTCEncodedFrameSetMetadata",
},
{
name: "RTCEncodedFrameTimestamps",
status: "stable",
},
{
name: "RTCEncodedSource",
status: "experimental",
},
{
name: "RTCEncodedVideoFrameAdditionalMetadata",
status: "experimental",
},
{
name: "RTCEncodedVideoFrameConstructor",
status: "experimental",
},
// Enables the use of jitterBufferTarget attribute in WebRTC.
// Spec: https://w3c.github.io/webrtc-extensions/#dom-rtcrtpreceiver-jitterbuffertarget
{
name: "RTCJitterBufferTarget",
status: "stable",
},
// Legacy callback-based getStats() has limited availability unless this
// Deprecation Trial is enabled.
// TODO(https://crbug.com/822696): Remove when origin trial ends.
{
name: "RTCLegacyCallbackBasedGetStats",
origin_trial_feature_name: "RTCLegacyCallbackBasedGetStats",
status: "experimental",
base_feature: "none",
},
{
name: "RTCLegacyDiagnosticLogging",
origin_trial_feature_name: "RTCDiagnosticLogging",
status: "experimental",
},
// Enables the use of |RTCRtpEncodingParameters.codec|
{
name: "RTCRtpEncodingParametersCodec",
status: "stable",
},
{
name: "RtcRtpHeaderEncryptionPolicy",
status: "experimental",
},
{
name: "RTCRtpScaleResolutionDownTo",
status: "stable",
},
{
name: "RTCRtpScriptTransform",
status: "stable",
},
{
name: "RTCRtpTransport",
status: "test",
},
{
name: "RTCStatsRelativePacketArrivalDelay",
origin_trial_feature_name: "RTCStatsRelativePacketArrivalDelay",
status: "experimental",
base_feature: "none",
},
// Enables the use of SVC scalability mode in WebRTC.
// Spec: https://w3c.github.io/webrtc-svc/
{
name: "RTCSvcScalabilityMode",
status: "stable",
},
{
// Places ruby annotations clear of the base's underline or overline.
// https://drafts.csswg.org/css-ruby-1/#ruby-text-decoration
name: "RubyTextDecorationSpacing",
status: "stable",
},
{
// Runs a microtask checkpoint before prepare script in
// XML Parser. This was added in M148 and can be removed
// after M150.
// https://issues.chromium.org/issues/439639184
name: "RunMicrotaskBeforeXmlScript",
status: "stable",
},
{
// HTML event loop invoking 'Run snapshot post-layout state steps' from
// the CSSOM View per spec proposal.
name: "RunSnapshotPostLayoutStateSteps",
status: "stable",
},
{
// https://issues.chromium.org/issues/429490608
name: "SanitizeIDNEmailFormInput",
status: "stable",
},
{
// Spec: https://wicg.github.io/sanitizer-api/
// Tracking bug: crbug.com/356601280
name: "SanitizerAPI",
status: "stable",
},
{
name: "ScopedViewTransitionSizeContainment",
status: "stable",
},
{
name: "ScoreLineBreakerAbort",
status: "stable",
},
{
// https://github.com/w3c/window-management/issues/149
name: "ScreenDetailedHdrHeadroom",
status: "experimental",
},
{
// crbug.com/406917902
name: "ScriptBasedOnUnicodeBlock",
status: "stable",
},
// WebSpeech API with both speech recognition and synthesis functionality
// is not fully enabled on all platforms.
{
name: "ScriptedSpeechRecognition",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "ScriptedSpeechSynthesis",
public: true,
status: "stable",
base_feature: "none",
},
{
// Use parent element for text node to compute relative offset when
// serializing scroll anchor to ensure consistency with
// ComputeUniqueSelector()
name: "ScrollAnchorSerializationUseParentForTextNode",
status: "stable",
},
{
// https://crbug.com/479472367
name: "ScrollAxisLock",
status: "stable",
},
{
name: "ScrollbarColor",
status: "stable",
},
{
name: "ScrollbarGutterBugFix",
status: "stable",
},
{
name: "ScrollbarWidth",
status: "stable",
},
{
// https://github.com/w3c/csswg-drafts/issues/9576
name: "ScrollIntoViewAlignAuto",
status: "experimental",
},
{
name: "ScrollIntoViewNearest",
status: "stable"
},
{
// Prevents scrollIntoView() from creating the initial sequential focus
// navigation starting point before one has been established.
// https://crbug.com/537801211
name: "ScrollIntoViewNoInitialFocusNavigationStartingPoint",
status: "stable",
},
// TODO(355460994): Remove after M129.
// scroll into root frame didn't take scrollbar and borders into account,
// while this is fixed, to avoid any web compat issues we have this killswitch.
{
name: "ScrollIntoViewRootFrameViewportBugFix",
status: "stable",
},
{
name: "ScrollPerformanceTiming",
status: "test",
},
{
// Separate flag for crbug.com/1426506 (getCurrentTime API change) which
// is expected to land after the initial launch of ScrollTimeline.
name: "ScrollTimelineCurrentTime",
status: "experimental"
},
{
// https://github.com/w3c/csswg-drafts/issues/9367#issuecomment-1854280461
name: "ScrollTimelineNamedRangeScroll",
status: "stable",
},
// Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
// as per the spec, matching other Web engines.
//
// This flag can't be removed until the Android min SDK version is 28
// (i.e., 'P') or later. See AWSettings.setScrollTopLeftInteropEnabled
// and its caller.
{
name: "ScrollTopLeftInterop",
status: "stable",
},
// Limits the number of scroll-to-text-fragment directives parsed per URL.
{
name: "ScrollToTextFragmentDirectiveLimit",
status: "stable",
},
{
name: "ScrollVisibilityHiddenScrollers",
status: "stable",
},
// Allows CSS styling of browser search results.
// https://issues.chromium.org/issues/339298411
// https://chromestatus.com/feature/5195073796177920
{
name: "SearchTextHighlightPseudo",
status: "stable",
},
// SecurePaymentConfirmation has shipped on some platforms, but its
// availability is controlled by the browser process (via the
// SecurePaymentConfirmationBrowser feature), as it requires browser
// support to function. See //content/public/common/content_features.cc
//
// The status is set to 'test' here to enable some WPT tests that only
// require blink-side support to function.
{
name: "SecurePaymentConfirmation",
public: true,
status: "test",
base_feature: "none",
},
// SecurePaymentConfirmationAvailabilityAPI needs to be kept as a runtime
// flag in order to disable the API in WebView.
{
name: "SecurePaymentConfirmationAvailabilityAPI",
status: "stable",
},
{
name: "SecurePaymentConfirmationCapabilities",
status: "stable",
},
{
name: "SecurePaymentConfirmationDebug",
base_feature: "none",
public: true,
},
{
name: "SecurePaymentConfirmationExtensionsDisallowForThirdParties",
status: "stable",
},
{
name: "SecurePaymentConfirmationOptOut",
origin_trial_feature_name: "SecurePaymentConfirmationOptOut",
origin_trial_allows_third_party: true,
status: "stable",
base_feature: "none",
},
{
// Make select popup anchor stay within web contents to prevent
// overlapping browser UI.
// TODO(https://issues.chromium.org/issues/511869411): Remove this flag
// after it has been shipped for long enough.
// Shipped in M150, changed slightly in M151, disabled in M151-M152,
// re-enabled in M153, safe to remove in M155.
name: "SelectAnchorInViewport",
status: "stable",
},
{
// SelectAudioOutput API
// https://chromestatus.com/feature/5164535504437248
name: "SelectAudioOutput",
status: {
"Android": "",
"default": "test",
},
},
{
// The selectedcontentelement attribute is for connecting select elements
// to arbitrary <selectedcontent> elements.
// https://github.com/openui/open-ui/issues/1063
// https://github.com/whatwg/html/issues/12227
name: "SelectedcontentelementAttribute",
status: "experimental",
},
{
// Makes the <selectedcontent> element work in <select multiple> by
// cloning the contents for each option which is selected into the
// <selectedcontent> element.
// https://issues.chromium.org/issues/483769482
name: "SelectedcontentMultiple",
status: "experimental",
depends_on: ["CustomizableSelectMultiplePopup"],
},
{
// See https://crbug.com/40664519
// Disabled due to UI freeze issues, see https://crbug.com/448833953.
name: "SelectionAndFocusedVisiblePositionMatch",
status: "experimental",
},
{
name: "SelectionCollapsedDirectionNone",
status: "stable",
},
{
// Allows a selection to extend into the light-DOM content assigned to a
// <slot>, e.g. the content of an open <details>, instead of clamping the
// focus at the slot's shadow host in EditingBoundaryAdjuster.
// See https://crbug.com/477613569
name: "SelectionEditingBoundarySlottedContent",
status: "stable",
},
{
// Fixes selection focus affinity at soft wrap boundaries. When the focus
// of a range selection is at a soft wrap boundary (a DOM offset shared by
// two visual lines), this ensures the correct affinity is used based on
// the selection direction.
// See https://crbug.com/40980028
name: "SelectionFocusAffinity",
status: "stable",
},
{
// Killswitch M141.
name: "SelectionHandleWithBottomClipped",
status: "stable",
},
{
// https://issues.chromium.org/issues/40502558
name: "SelectionRemoveRangeNotFoundError",
status: "stable",
},
{
// https://issues.chromium.org/issues/40502558
name: "SelectionSetBaseAndExtentNonNullNode",
status: "experimental",
settable_from_internals: true,
},
{
// See https://chromestatus.com/feature/4811835974615040
name: "SelectivePermissionsIntervention",
status: "stable",
},
{
// Removes the forced overflow:hidden rules on the select element's
// InnerElement unless the author specifies text-overflow:ellipsis. May
// cause text to overlap with the dropdown indicator.
// https://issues.chromium.org/issues/40805967
name: "SelectRemoveOverflowHidden",
status: "stable",
},
{
// Makes <select> discover its options, optgroups, separators, and
// customizable trigger button through the flat tree.
// See https://chromestatus.com/feature/5127427618635776
name: "SelectUsesFlatTree",
},
{
name: "SendBeaconThrowForBlobWithNonSimpleType",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "SendEarlyLastBeginMainFrame",
status: "stable",
},
{
// SlotChange signal is sent after node insertion is complete,
// ensuring that slot fallback content is handled correctly.
// This was added in M145 and can be removed after M147.
// https://issues.chromium.org/issues/40150299
name: "SendSlotChangeSignalAfterNodeInserted",
status: "stable",
},
{
name: "SensorExtraClasses",
public: true,
status: "experimental",
base_feature: "none",
},
{
// Separate defer and module script execution into individual tasks
// to comply with HTML spec requirement to "spin the event loop" between
// each script execution. This prevents long tasks and improves responsiveness.
// https://crbug.com/40894694
name: "SeparateDeferModuleScriptTasks",
status: "stable",
},
{
// Exposes the Focusable interface, DocumentOrShadowRoot.activeFocusable,
// CSSPseudoElement.focus(), and sequential focus navigation primitives.
// https://crbug.com/565786176
name: "SequentialFocusPrimitives",
depends_on: ["CSSPseudoElementInterface"],
status: "test",
},
{
// Adds the `shadowRoots` option to the Focusable constructors (and the
// constructor that takes a Focusable), which exposes focusable items
// inside those shadow trees.
// https://crbug.com/565786176
name: "SequentialFocusPrimitivesShadowRoots",
depends_on: ["SequentialFocusPrimitives"],
status: "test",
},
{
name: "Serial",
status: "stable",
base_feature: "WebSerialAPI",
},
{
// Serialize invalid selector text in the forgiving selector list.
// https://github.com/w3c/csswg-drafts/issues/8356
name: "SerializeInvalidSelectorsInForgivingSelectorList",
status: "experimental",
},
{
name: "SerializeViewTransitionStateInSPA",
},
{
name: "SerialPortConnected",
status: {"Android": "", "default": "experimental"},
base_feature: "none",
},
{
// Support for Service Worker background sync APIs in Dedicated Workers.
// See https://chromestatus.com/feature/6497653025931264
// See https://issues.chromium.org/issues/40364838
name: "ServiceWorkerBackgroundSyncInDedicatedWorker",
depends_on: ["ServiceWorkerInDedicatedWorker"],
},
{
name: "ServiceWorkerClientLifecycleState",
status: "experimental",
},
{
// V8 Code Cache for resource requests passing through Service Worker.
name: "ServiceWorkerCodeCache",
status: "stable",
},
{
// Enforces SHA-256 source hash verification for V8 code caches on
// scripts fetched via Service Worker (crbug.com/547815507).
name: "ServiceWorkerCodeCacheHashing",
status: "stable",
},
{
// Support for Service Worker APIs in Dedicated Workers.
// See https://chromestatus.com/feature/6497653025931264
// See https://issues.chromium.org/issues/40364838
name: "ServiceWorkerInDedicatedWorker",
},
{
// Killswitch for crbug.com/552757015.
name: "ServiceWorkerScriptEncoding",
status: "stable",
},
{
name: "ServiceWorkerStaticRouterTimingInfo",
status: "stable",
},
{
name: "SetHTMLCanRunScripts",
status: "stable",
},
{
name: "SetSequentialFocusStartingPoint",
status: "experimental",
},
{
name: "SetShape",
status: {"ChromeOS": "experimental", "default": ""},
browser_process_read_write_access: true,
},
// https://crbug.com/448174611
{
name: "ShadowRootAdoptedStyleSheet",
implied_by: ["DeclarativeCSSModules"],
origin_trial_feature_name: "DeclarativeCSSModules",
},
{
// Only allow attachShadow() on elements with the HTML namespace.
// See crbug.com/521896365
name: "ShadowRootNamespaceCheck",
},
{
// Reference Target allows IDREF attributes to refer inside Shadow DOM.
// crbug.com/346835896
name: "ShadowRootReferenceTarget",
status: "stable",
origin_trial_feature_name: "ShadowRootReferenceTarget"
},
{
// If enabled, Reference Target will support aria-owns.
// https://github.com/WICG/webcomponents/issues/1091
name: "ShadowRootReferenceTargetAriaOwns",
},
{
// Lets declarative shadow roots opt into manual slot assignment.
// crbug.com/493315747
name: "ShadowRootSlotAssignment",
status: "stable",
},
{
name: "SharedArrayBuffer",
base_feature: "none",
public: true,
},
{
name: "SharedArrayBufferUnrestrictedAccessAllowed",
base_feature: "none",
public: true,
},
{
name: "SharedWorker",
public: true,
status: "stable",
},
{
// If enabled, SharedWorker supports extendedLifetime
// https://github.com/whatwg/html/issues/10997
// https://issues.chromium.org/issues/400473072
name: "SharedWorkerExtendedLifetime",
status: "stable",
origin_trial_feature_name: "SharedWorkerExtendedLifetime",
origin_trial_allows_third_party: true,
},
{
name: "SideRelativeBackgroundPosition",
status: "stable",
public: true,
},
{
name: "SignatureBasedInlineIntegrity",
status: "experimental",
},
{
name: "SingleAxisScrollContainers",
status: "stable",
},
{
name: "SingleAxisScrollContainersForScrollSnap",
depends_on: ["SingleAxisScrollContainers"],
status: "experimental",
},
{
name: "SkipAd",
depends_on: ["MediaSession"],
status: "stable",
},
{
// If enabled, only call ResourceLoadObserver callbacks if the DevTools
// panel is open.
name: "SkipCallbacksWhenDevToolsNotOpen",
status: "experimental",
},
{
// Kill switch for https://crbug.com/569098933. Doesn't composite a
// backdrop-filter animation whose value can't change (e.g. the view
// transition group animation from `none` to the underlying `none`),
// which would require render surfaces for the animating element and for
// its backdrop root. The animation still makes the element a stacking
// context.
name: "SkipCompositingStaticBackdropFilterAnimation",
status: "stable",
},
{
// Improves performance of event dispatching by skipping the capture
// phase if there are no capture listeners registered on the page.
name: "SkipEventCapture",
status: "stable",
},
{
// Kill switch for crbug.com/41254682: skips paint invalidation for
// paint-only style changes (e.g. animation frames) on objects that were
// and stay visibility:hidden.
name: "SkipPaintInvalidationWhileStayingInvisible",
status: "stable",
},
{
// crbug.com/517761566
name: "SkipStaleUndoStepsInIdleSpellCheck",
status: "stable",
},
{
// Kill switch for https://crbug.com/569098933. Doesn't tick an animation
// on the main thread if none of its values can change while it's in play
// (e.g. the view transition `mix-blend-mode: plus-lighter` animation),
// even if it can't run on the compositor for another reason, such as
// affecting an !important property.
name: "SkipTickingStaticAnimations",
status: "stable",
},
{
// Skips the browser touch event filter, ensuring that events that reach
// the queue and would otherwise be filtered out will instead be passed
// onto the renderer compositor process as long as the page hasn't timed
// out. If skip_filtering_process is browser_and_renderer, also skip the
// renderer cc touch event filter, ensuring that events will be passed
// onto the renderer main thread.
name: "SkipTouchEventFilter",
status: "stable",
},
{
// See crbug.com/446113738.
name: "SkipUnselectableElementsInParagraphBoundary",
status: "stable",
},
{
name: "SmallerViewportUnits",
status: "stable",
},
{
name: "SmartCard",
status: {
"Android": "",
"ChromeOS": "stable",
"default": "test",
},
},
{
name: "SmartZoom",
base_feature: "none",
public: true,
status: {"Android": "test"},
},
{
// Snapshot scroll-timelines post layout only. See
// RunSnapshotPostLayoutStateSteps flag.
name: "SnapshotScrollTimelinesPostLayout",
depends_on: ["RunSnapshotPostLayoutStateSteps"],
},
{
name: "SortedLayoutShiftSourcesByImpactArea",
status: "stable",
},
{
// Source-specific multicast support in the Direct Sockets API. Not
// depends_on: ["DirectSockets"] — DirectSockets is enabled per-context
// (isolated contexts) rather than via the static flag, so a static
// dependency would keep this feature off everywhere it matters. Actual
// exposure is gated by MulticastController's Exposed() clause.
name: "SourceSpecificMulticastInDirectSockets",
status: "test",
},
{
// Whether spatial navigation should use cursor inheritance to exclude
// nodes where cursor is inherited. Kill-switch that can be remove once
// the change goes through a stable release.
name: "SpatNavUsesCursorInheritance",
status: "stable",
},
{
name: "SpeakerSelection",
status: "experimental",
},
{
// Enables spec-compliant suffix matching for XML MIME types
// (e.g., text/html+xml) by allowing *+xml patterns.
// https://mimesniff.spec.whatwg.org/#xml-mime-type
// https://crbug.com/362282752
name: "SpecCompliantXmlMimeTypes",
status: "experimental",
},
{
// Exposes speculation measurement data (preloads, prefetches, prerenders)
// on performance.speculations.
name: "SpeculationMeasurement",
origin_trial_feature_name: "SpeculationMeasurement",
origin_trial_allows_third_party: true,
status: "experimental",
},
{
// Exposes author controls for the mobile "moderate" eagerness viewport
// heuristic via a ruleset-level "moderate_viewport_heuristics" key in
// speculation rules. Android-only, since the heuristic only runs on
// Android. Third-party tokens are allowed so that scripts injecting
// speculation rules cross-origin (e.g. performance libraries) can opt in.
// https://groups.google.com/a/chromium.org/g/blink-dev/c/YYBd-eksiE8
name: "SpeculationRulesModerateViewportHeuristicsControl",
origin_trial_feature_name: "SpeculationRulesModerateViewportHeuristicsControl",
origin_trial_allows_third_party: true,
origin_trial_os: ["Android"],
status: "experimental",
},
{
name: "SpellCheckChunking",
status: {"Android": "stable"},
},
{
// API for accessing the Custom Dictionary for spell checking purpose.
// https://chromestatus.com/feature/6185007701557248
name: "SpellCheckCustomDictionaryAPI",
status: "experimental",
public: true,
},
{
// Splits a qualified name on its first colon, per the DOM "validate and
// extract" algorithm, so any later colons are part of the local name.
// See https://crbug.com/490251709
name: "SplitQualifiedNameOnFirstColon",
status: "experimental",
},
{
name: "SplitTextNotCleanupDummySpans",
status: "stable",
},
// Kill switch for change to unify image-set and srcset selection logic.
{
name: "SrcsetSelectionMatchesImageSet",
status: "stable",
},
// Used as argument in attribute of stable-release functions/interfaces
// where a runtime-enabled feature name is required for correct IDL syntax.
// This is a global flag; do not change its status.
{
name: "StableBlinkFeatures",
status: "stable",
base_feature: "none",
},
{
// Kill switch for falsifying IsStacked() for non-stacked
// stacking contexts. https://crbug.com/40208685
name: "StackingContextIsNotStacked",
status: "stable",
},
{
// Kill switch for sending ImageChanged() to newly added
// observers while a stale cached image is revalidating.
// https://crbug.com/40757070
name: "StaleImageNaturalSizeDuringRevalidation",
status: "stable",
},
{
// See https://github.com/w3c/csswg-drafts/issues/9398
name: "StandardizedBrowserZoom",
status: "stable",
public: true,
},
{
name: "StandardizedBrowserZoomOptOut",
origin_trial_feature_name: "DisableStandardizedBrowserZoom",
origin_trial_type: "deprecation",
origin_trial_allows_insecure: true,
origin_trial_allows_third_party: true,
},
{
// Killswitch M149.
name: "StickyPositionHasOverflowPerAxis",
status: "stable",
},
{
// Preserves the sticky user activation state after a page navigates to
// another same-origin page. https://crbug.com/433729626
name: "StickyUserActivationAcrossSameOriginNavigation",
status: "stable",
},
{
name: "StorageBuckets",
status: "stable",
},
{
// Gates the `durability()` method on a storage bucket and the property in
// the options struct.
name: "StorageBucketsDurability",
status: "experimental",
},
{
// Gates the `locks()` method on a storage bucket.
name: "StorageBucketsLocks",
status: "experimental",
},
{
name: "StrictMimeTypesForWorkers",
status: "experimental",
},
{
// When enabled, a StyleImage/FontResource cached on a (potentially
// shared) StyleSheetContents is keyed on the requesting document's
// ResourceFetcher, so a second document that shares the stylesheet
// re-runs its own request checks (e.g. Content Security Policy) instead
// of reusing the first document's already-fetched resource. crbug.com/504107363.
name: "StyleResourceFetcherIdentityCheck",
status: "stable",
},
{
name: "StylusHandwriting",
base_feature: "none",
},
{
name: "SubApps",
status: "stable",
},
// Killswitch to guard capturing the subframe owner element instead of the
// inner element on mouse press.
{
name: "SubframeMouseCaptureOwner",
status: "stable",
},
{
// Require the requesting view to have focus before allowing it go
// fullscreen, unless it has a fullscreen token through capability
// delegation. https://crbug.com/40052279
name: "SuppressFullscreenFromUnfocusedView",
status: "stable",
},
// 'pointercancel' and boundary leave ('pointerout' and 'pointerleave')
// events would now fire after a mouse drag start, matching the spec's
// definition of "pointer stream suppression". See:
// https://github.com/w3c/pointerevents/issues/555
{
name: "SuppressPointerStreamAfterDrag",
status: "stable",
},
{
name: "SvgAnimateMotionDiscreteCalcMode",
status: "stable",
},
{
name: "SvgAvoidResettingFilterQualityForTiledPattern",
status: "stable",
},
{
// Apply CSS 3D transforms (perspective(), rotateX/Y, translateZ, ...)
// to SVG child elements when painting instead of flattening them to a
// 2D affine matrix.
// https://issues.chromium.org/41310059
name: "SvgCss3dTransforms",
status: "experimental",
},
{
// Treat SVG documents in <object>/<embed> as replaced elements
// https://issues.chromium.org/41302806
name: "SVGEmbeddedAsReplacedElement",
status: "experimental",
},
{
// Don't accept the empty string as a valid value in some cases.
name: "SvgEmptyAttributeStringParsingFix",
status: "stable",
},
{
name: "SvgEnableTextDecorationCssStyling",
status: "stable",
},
{
name: "SvgFallBackToContainerSize",
status: "stable",
},
{
name: "SvgFeImageEXIFOrientation",
status: "stable",
},
{
name: "SvgFeImageSkipHiddenContainerViewportDependence",
status: "stable",
},
{
name: "SvgFilterPaintsForHiddenContent",
status: "stable",
},
{
name: "SvgFilterUserSpaceViewportForSvg",
status: "stable",
},
{
name: "SvgIgnoreNegativeEllipseRadii",
status: "stable",
},
{
name: "SvgImageAnimationReset",
status: "stable",
},
{
name: "SvgImageNonUniformScalingFix",
status: "stable",
},
{
name: "SvgIncrementalStyle",
status: "stable",
},
{
name: "SvgInlineRootPixelSnappingScaleAdjustment",
status: "test",
},
{
// When enabled, short-circuits shadow instance synchronization when SVG
// elements cannot have instances (no rare data).
name: "SvgInstanceSyncOptimization",
status: "stable",
},
{
name: "SvgLengthResolveUnparsedValue",
status: "stable",
},
{
name: "SvgNewZoom",
},
{
// Structured access to SVG path segments via getPathData/setPathData.
// https://issues.chromium.org/40441025
name: "SVGPathDataAPI",
status: "experimental",
},
{
name: "SvgPathLengthCssProperty",
status: "experimental",
},
{
name: "SvgScriptElementAsyncAttribute",
status: "stable",
},
{
// Kill switch for marking fragment-parsed SVG <script> elements
// "already started" so they stay inert when cloned. crbug.com/538197148
name: "SvgScriptFragmentAlreadyStarted",
status: "stable",
},
{
name: "SvgSizingWithPreserveAspectRatioNone",
status: "experimental",
},
{
name: "SvgStyleElementReflectTypeAndMedia",
status: "stable",
},
{
name: "SvgSupportMediaFragments",
status: "experimental",
},
{
name: "SVGTextPathSideAttribute",
status: "experimental",
},
{
name: "SvgUseNestedResourceDocuments",
status: "stable",
},
{
name: "SvgUseNestedResourceDocumentsDelayLoad",
status: "stable",
},
{
name: "SynthesizedKeyboardEventsForAccessibilityActions",
status: "experimental",
},
{
name: "SyntheticMouseHoverOverInactivePage",
status: "experimental",
},
{
name: "SystemWakeLock",
status: "experimental",
},
{
name: "TabAlignmentWithFloats",
status: "stable",
},
{
// When enabled (the legacy behavior), interior cell borders from the
// `border`/`rules` attributes inherit the table's border-color. Disable
// to launch the spec-compliant behavior, where they resolve to
// `currentColor` instead (border-color is not inherited). The
// `bordercolor` attribute always propagates. Matches Gecko when disabled.
// See crbug.com/40745409.
name: "TableCellBorderColorInherit",
status: "stable",
},
{
// Remove <table>'s explicit `border-color: gray` UA stylesheet rule,
// since it is non-standard. See crbug.com/494554835.
// This shipped in M149, was updated in M151, and can be removed in M153.
name: "TableDefaultBorderColorCurrentColor",
status: "stable",
},
{
name: "TableIsAutoFixedLayout",
status: "test",
},
{
name: "TabSizeInRubyBase",
status: "stable",
},
{
// When checking the shadow tree during invoke(),
// use the invocationTargetInShadowTree saved before
// calling the listener.
// This was added in M142 and can be removed after M147.
// https://issues.chromium.org/issues/41408360
name: "TargetInShadowDeterminedBeforeListener",
status: "stable",
},
{
// Makes getTargetRanges() of a deleteContentBackward beforeinput event
// cover only the code points that are actually deleted, instead of the
// whole grapheme cluster behind the caret.
// Enabled in M153, safe to remove in M155.
// https://issues.chromium.org/issues/539754135
name: "TargetRangesForBackwardDeletionUnit",
status: "stable",
},
{
// Kill switch for releasing directly focused temporal input hosts on blur.
// See crbug.com/541316137.
name: "TemporalInputHostBlur",
status: "stable",
},
// For unit tests.
{
// This is for testing copied_from_base_feature_if.
// This is set in base/test/test_suite.cc.
name: "TestBlinkFeatureDefault",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "TestFeature",
base_feature: "none",
browser_process_read_write_access: true,
},
// For unit tests.
{
name: "TestFeatureCustomEnableCheck",
base_feature: "none",
custom_enable_check: "CanEnableTestFeature",
},
// For unit tests.
{
name: "TestFeatureDependent",
depends_on: ["TestFeatureImplied"],
base_feature: "none",
},
// This is a feature used for testing what happens when an origin trial
// feature has browser-process read/write access. It should never be used
// in production code.
{
name: "TestFeatureForBrowserProcessReadWriteAccessOriginTrial",
origin_trial_feature_name: "TestFeatureForBrowserProcessReadWriteAccessOriginTrial",
base_feature: "none",
browser_process_read_write_access: true,
},
// For unit tests.
{
name: "TestFeatureImplied",
implied_by: ["TestFeature"],
base_feature: "none",
},
// For unit tests.
{
name: "TestFeatureStable",
status: "stable",
},
{
name: "TextAreaResizerFixedSize",
status: "stable",
},
{
// crbug.com/523134883: Ignore ruby annotation text when computing
// text-autospace boundaries.
name: "TextAutoSpaceIgnoreRubyAnnotation",
status: "stable",
},
{
name: "TextBoxTrimForNestedList",
status: "stable",
},
{
// Kill switch for crbug.com/514953511.
name: "TextBoxTrimOnInlineBox",
status: "stable",
},
{
// Kill switch for crbug.com/562543774.
name: "TextBoxTrimOnInlineBoxTextDecoration",
depends_on: ["TextBoxTrimOnInlineBox"],
status: "stable",
},
{
name: "TextDetector",
status: "experimental",
},
{
// crbug.com/368657256
name: "TextEmphasisPositionAuto",
status: "experimental",
},
{
name: "TextFragmentAPI",
status: "experimental",
},
{
name: "TextFragmentIdentifiers",
origin_trial_feature_name: "TextFragmentIdentifiers",
public: true,
status: "stable",
base_feature: "TextFragmentAnchor",
},
{
name: "TextFragmentTapOpensContextMenu",
status: {"Android": "stable"},
},
{
// crbug.com/556235808
name: "TextIteratorExcludeAutofilledSelectFix",
status: "stable",
},
{
name: "TextMetricsBaselines",
status: "stable",
},
{
// When enabled, text-overflow ellipsis is clipped when
// selection focus is inside the element, revealing the full text content.
// See https://crbug.com/40731275
name: "TextOverflowClipWithSelection",
status: "stable",
},
{
// crbug.com/556432992
name: "TextOverflowInTextarea",
status: "stable",
},
{
// https://crbug.com/41492459
// ChromeStatus: https://chromestatus.com/feature/6294595288825856
name: "TextOverflowString",
status: "stable",
},
{
name: "TextScaleMetaTag",
status: "stable",
},
{
// crbug.com/431660829
name: "TextSpacingTrimFallback",
status: "stable",
},
{
// crbug.com/431660829
name: "TextSpacingTrimFallback2",
depends_on: ["TextSpacingTrimFallback"],
status: "test",
},
{
// crbug.com/440947112
name: "TextSpacingTrimFallbackChws",
depends_on: ["TextSpacingTrimFallback"],
status: "stable",
},
{
// crbug.com/514448226
name: "TextStreamMethod",
status: "stable",
},
{
// https://drafts.csswg.org/web-animations-2/#triggers
name: "TimelineTrigger",
status: "stable",
},
{
// Killswitch for the time picker offering only the values that the step
// attribute allows.
name: "TimePickerHonorsStep",
status: "stable",
},
{
name: "TimerThrottlingForBackgroundTabs",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "TimestampBasedCLSTracking",
status: "experimental"
},
{
name: "TimeZoneChangeEvent",
status: "experimental",
},
{
name: "TopicsAPI",
base_feature: "none",
public: true,
status: "stable",
},
// This feature allows touch dragging and a context menu to occur
// simultaneously, with the assumption that the menu is non-modal. Without
// this feature, a long-press touch gesture can start either a drag or a
// context-menu in Blink, not both (more precisely, a context menu is shown
// only if a drag cannot be started).
// This feature is enabled by default in Android, where
// TouchDragOnShortPress is not shipped due to interactions with the OS that
// caused issues in the behavior.
// Please see https://issues.chromium.org/40823294
{
name: "TouchDragAndContextMenu",
base_feature: "none",
public: true,
},
// This feature enables drag and drop using touch input devices. Replaces
// the old "--enable-touch-drag-drop" and "--disable-touch-drag-drop"
// switches.
// Enabled by default in Android, ChromeOS, Windows, and Linux.
{
name: "TouchDragAndDrop",
base_feature: "none",
public: true,
},
// This feature makes touch dragging to occur at the short-press gesture,
// which occurs right before the long-press gesture.
{
name: "TouchDragOnShortPress",
depends_on: ["TouchDragAndDrop"],
status: {
"Win": "stable",
},
},
// Many websites disable mouse support when touch APIs are available. We'd
// like to enable this always but can't until more websites fix this bug.
// Chromium sets this conditionally (eg. based on the presence of a
// touchscreen) in ApplyWebPreferences. "Touch events" themselves are always
// enabled since they're a feature always supported by Chrome.
{
name: "TouchEventFeatureDetection",
origin_trial_feature_name: "ForceTouchEventFeatureDetectionForInspector",
public: true,
status: "stable",
base_feature: "none",
},
// Set to reflect the kTouchTextEditingRedesign feature.
{
name: "TouchTextEditingRedesign",
base_feature: "none",
},
{
name: "TrackAnimatedSources",
status: "test",
},
{
name: "TransferableRTCDataChannel",
status: "stable",
},
// This is conditionally set if the platform supports translation.
{
name: "TranslateService",
},
{
name: "TranslationAPI",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
"default": "",
},
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "TranslationAPIForWorkers",
public: true,
},
{
// When enabled, treats the initial navigation to about:blank#fragment in
// an MHTML document as a cross-document navigation.
//
// Although it appears to be a same-document fragment navigation, MHTML
// loading replaces the initial empty document with a new committed
// document that has an opaque origin.
//
// This feature acts as a kill switch for https://crbug.com/40580002.
name: "TreatMhtmlInitialDocumentLoadsAsCrossDocument",
status: "stable",
},
{
// When enabled, trusted types can be used to enforce sanitization &
// script running rules.
// For example, it can enforce that any HTML setter would go through a
// sanitizer. See https://github.com/w3c/trusted-types/issues/594
name: "TrustedTypesCreateParserOptions",
status: "stable",
depends_on: ["SanitizerAPI", "SetHTMLCanRunScripts"],
},
{
name: "TrustedTypesFromLiteral",
status: "experimental",
base_feature: "none",
},
{
name: "TrustedTypesUseCodeLike",
status: "experimental",
},
{
name: "TwoPhaseViewTransition",
status: "experimental",
},
{
name: "UAImageReplacementAPI",
origin_trial_feature_name: "UAImageReplacementAPI",
},
{
// The Unbounded Element API. See crbug.com/508672616.
// Note that this flag is enabled by default, to enable WebUI and other
// privileged UI to depend on this feature. The flag is here as a kill
// switch. Importantly, open web content still requires
// UnsafeUnboundedElementOnTheOpenWeb to be enabled.
// There is an override in SetCustomizedRuntimeFeaturesFromCombinedArgs to ensure this
// is only enabled for Android U+, which is the minimum version the platform supports.
name: "UnboundedElement",
public: true,
status: "stable",
implied_by: ["UnsafeUnboundedElementOnTheOpenWeb"],
},
{
name: "UnclosedFormControlIsInvalid",
status: "experimental",
},
{
name: "UnexposedTaskIds",
},
// This is a kill switch for the unprefixed Web Speech API.
{
name: "UnprefixedSpeechRecognition",
status: "stable",
},
{
name: "UnrestrictedMeasureUserAgentSpecificMemory",
},
// This is a reverse OT used for a phased deprecation, on desktop
// https://crbug.com/1071424
{
name: "UnrestrictedSharedArrayBuffer",
base_feature: "none",
origin_trial_feature_name: "UnrestrictedSharedArrayBuffer",
origin_trial_os: ["win", "mac", "linux", "fuchsia", "chromeos"],
},
// Enables using policy-controlled feature "usb-unrestricted" to allow
// isolated context to access protected USB interface classes and to
// bypass the USB blocklist.
{
name: "UnrestrictedUsb",
status: "stable",
depends_on: ["WebUSB"],
},
{
// The Unbounded Element API. See crbug.com/508672616.
// Allows open web content to escape the bounds of the top level window.
name: "UnsafeEscapingUnboundedElementOnTheOpenWeb",
public: true,
},
{
// The Unbounded Element API. See crbug.com/508672616.
// Enable Unbounded Element on the open web, with the bounds of the
// unbounded element limited to the topmost main frame bounds. (No
// escaping beyond the main frame, including over the Omnibox, etc.)
name: "UnsafeUnboundedElementOnTheOpenWeb",
public: true,
implied_by: ["UnsafeEscapingUnboundedElementOnTheOpenWeb"],
},
// If enabled, notify the associated DisplayCutoutHost of changes in
// complex safe area constraint usage on the page.
// Only Android may make use of this feature currently.
{
name: "UpdateComplexSafaAreaConstraints",
status: {
"Android": "stable",
"default": "",
}
},
// Fix for https://crbug.com/41329214.
{
name: "UpdateSelectionOnNodeInsertion"
},
{
name: "URLPatternCompareComponent",
status: "experimental",
},
{
name: "URLPatternGenerate",
status: "experimental",
},
{
name: "URLSearchParamsHasAndDeleteMultipleArgs",
status: "stable",
},
{
name: "UseBeginFramePresentationFeedback",
status: {
"ChromeOS": "stable",
},
},
{
// Android currently uses low-quality interpolation, while other platforms
// default to medium-quality. This flag is for experimenting with changing
// the value on Android. See: https://crbug.com/374315986.
name: "UseLowQualityInterpolation",
status: {
"Android": "stable",
"default": "",
},
},
{
// This flag uses the original DOM text for input when the password
// echo is enabled to create the offset_map.
name: "UseOriginalDomOffsetsForOffsetMap",
status: "test",
},
{
name: "UsePaintGeometryForIntersection",
status: "stable",
},
{
name: "UsePositionForPointInFlexibleBoxWithSingleChildElement",
status: "stable",
},
{
name: "UsePositionIfIsVisuallyEquivalentCandidate",
status: "stable",
},
{
// Stops user action pseudo-classes from propagating out of top layer
// elements. See https://crbug.com/407769114.
// This shipped in M149, and can be removed in M151.
name: "UserActionPseudosStopAtTopLayer",
status: "stable",
},
{
name: "UserDefinedEntryPointTiming",
status: "experimental",
},
{
name: "UserMediaElement",
status: "stable",
public: true,
},
{
// Allowing legacy compatibility paths for usermedia element (such as
// the 'type' attribute carried over from older permission element
// implementations).
name: "UserMediaElementLegacy",
// By mapping this new flag to the existing "UserMediaElement" origin
// trial name, both features can be evaluated concurrently during the
// trial phase while preserving a partner-less-effort path for future
// deprecation.
origin_trial_feature_name: "UserMediaElement",
},
{
name: "UseShadowHostStyleCheckEditable",
status: "stable",
},
{
name: "UseUndoStepElementDispatchBeforeInput",
status: "stable",
},
{
name: "V8IdleTasks",
base_feature: "none",
public: true,
},
{
name: "VariableSystemFontSupportOnWindows",
},
{
// Whether a video element should automatically play fullscreen unless
// 'playsinline' is set.
name: "VideoAutoFullscreen",
settable_from_internals: true,
},
{
name: "VideoFrameMetadataBackgroundBlur",
status: "experimental",
},
{
name: "VideoFrameMetadataRtpTimestamp",
status: "stable",
},
{
name: "VideoFullscreenOrientationLock",
},
{
name: "VideoRotateToFullscreen",
},
{
name: "VideoTrackGenerator",
status: "test",
},
{
name: "VideoTrackGeneratorInWindow",
status: "test",
},
{
name: "VideoTrackGeneratorInWorker",
},
{
name: "ViewportHeightClientHintHeader",
status: "stable",
},
{
name: "ViewportSegments",
status: "stable",
},
{
name: "ViewTransitionLongCallbackTimeoutForTesting",
status: "test",
},
{
// Kill switch for https://crbug.com/569098933. Doesn't snap the browser
// controls to fully shown when capturing the outgoing document of a
// cross-document view transition if the browser controls have zero
// height, since that would force a new LocalSurfaceId for the capture.
name: "ViewTransitionSkipZeroHeightControlsSnap",
status: "stable",
},
{
name: "VisibilityCollapseColumn",
},
{
// Guards the removal of legacy visual rect inflation when mapping through
// nested 2D transforms. Prevents rotated or skewed descendants from being
// repeatedly expanded while computing visible bounds.
name: "VisualRectMappingFixForExpansion",
status: "stable",
},
{
// The "WakeLock" feature was originally implied_by "ScreenWakeLock" and
// "SystemWakeLock". The former was removed after being promoted to
// stable, but we need to keep this feature around for code and IDLs that
// should work with both screen and system wake locks.
name: "WakeLock",
status: "stable",
implied_by: ["SystemWakeLock"],
},
{
// When enabled, this will issue a warning to the console any time
// rendering is forced withing content-visibility subtrees (both
// content-visibility: auto and content-visibility: hidden).
name: "WarnOnContentVisibilityRenderAccess",
},
{
// Anchors the wavy text decoration pattern at the decorating box so the
// wave phase continues across inline fragment boundaries. Enabled by
// default; acts as a kill switch. https://crbug.com/41287729
name: "WavyDecorationContinuousPhase",
status: "stable",
},
{
// https://chromestatus.com/feature/5183481574850560
name: "WebAppInstallation",
status: {"Android": "", "default": "test"},
origin_trial_feature_name: "WebAppInstallation",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
public: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
// This needs to be kept as a runtime flag
// in order to disable the API in WebView.
name: "WebAppLaunchQueue",
status: "stable",
},
{
name: "WebAppScopeExtensions",
origin_trial_feature_name: "WebAppScopeExtensions",
origin_trial_os: ["win", "mac", "linux", "chromeos"],
status: "experimental",
base_feature: "none",
},
{
// If enabled, form controls will only render the OS accent color in a
// web app context for the initial browser profile.
name: "WebAppScopeSystemAccentColor",
status: "stable",
},
{
name: "WebAppTabStrip",
status: {
"ChromeOS": "stable",
"default": "experimental"
},
base_feature: "DesktopPWAsTabStrip",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "WebAppTabStripCustomizations",
status: {
"ChromeOS": "stable",
"default": "experimental"
},
base_feature: "DesktopPWAsTabStripCustomizations",
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
},
{
name: "WebAppTranslations",
status: "experimental",
base_feature: "WebAppEnableTranslations",
},
{
// https://chromestatus.com/feature/6024844719947776, take 2
name: "WebAssemblyCustomDescriptorsV2",
origin_trial_feature_name: "WebAssemblyCustomDescriptorsV2",
status: "experimental",
base_feature: "none",
},
{
// WebAssembly JS Promise Integration,
// https://github.com/WebAssembly/js-promise-integration/blob/main/proposals/js-promise-integration
name: "WebAssemblyJSPromiseIntegration",
origin_trial_feature_name: "WebAssemblyJSPromiseIntegration",
status: "experimental",
base_feature: "none",
},
{
// https://chromestatus.com/feature/5077691662073856
name: "WebAudioBypassOutputBuffering",
status: {
"Win": "stable",
"ChromeOS": "stable",
"Mac": "stable",
"Linux": "stable",
},
},
{
// https://chromestatus.com/feature/5077691662073856
// Allows an Enterprise Policy to override WebAudioBypassOutputBuffering
name: "WebAudioBypassOutputBufferingOptOut",
public: true,
},
{
// https://webaudio.github.io/web-audio-api/#dom-baseaudiocontext-renderquantumsize
name: "WebAudioConfigurableRenderQuantum",
origin_trial_feature_name: "WebAudioConfigurableRenderQuantum",
status: "stable",
},
// WebAuth is disabled on Android versions prior to N (7.0) due to lack of
// supporting APIs, see runtime_features.cc.
{
name: "WebAuth",
status: "stable",
},
// When enabled adds the authenticator attachment used for registration and
// authentication to the public key credential response.
{
name: "WebAuthAuthenticatorAttachment",
status: "test",
},
// Prototyping https://github.com/w3c/webauthn/issues/2144
{
name: "WebAuthenticationAmbient",
status: "experimental",
base_feature: "none",
public: true,
},
// https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats
{
name: "WebAuthenticationAttestationFormats",
status: "experimental",
origin_trial_feature_name: "WebAuthnAttestationFormats",
origin_trial_os: ["android"],
origin_trial_allows_third_party: true,
},
{
name: "WebAuthenticationCmtgKey",
status: "experimental",
},
{
name: "WebAuthenticationCrossDeviceFallbackUrl",
status: {"Android": "", "default": "experimental"},
base_feature: "none",
public: true,
},
// Lets an authorized remote desktop client supply the clientDataJSON for a
// WebAuthn request. Can be enabled only in conjunction with
// the device::kWebAuthnRemoteClientDataJson base::Feature.
// https://w3c.github.io/webauthn/#sctn-remote-client-data-json-extension
{
name: "WebAuthenticationRemoteClientDataJson",
base_feature: "none",
public: true,
},
{
name: "WebAuthenticationRemoteDesktopSupport",
base_feature: "none",
public: true,
},
{
// Reflects the HTML `autocorrect` content attribute's used autocorrection
// state to the platform IME: autocorrection is On by default and forced
// Off for URL/Email/Password inputs (and an `autocorrect=off` form owner).
// https://html.spec.whatwg.org/multipage/interaction.html#autocorrection
name: "WebAutocorrectByDefault",
status: "stable",
},
// WebBluetooth is enabled by default on Android, ChromeOS, iOS, macOS and
// Windows.
{
name: "WebBluetooth",
public: true,
status: {
"Android": "stable",
"ChromeOS": "stable",
"iOS": "stable",
"Mac": "stable",
"Win": "stable",
"default": "experimental",
},
base_feature: "none",
},
{
name: "WebBluetoothGetDevices",
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebBluetoothScanning",
status: "experimental",
},
{
name: "WebBluetoothWatchAdvertisements",
public: true,
status: "experimental",
base_feature: "none",
},
{
// Restricts the sharing of BluetoothDevice instances across different V8
// worlds (e.g., main world and isolated worlds) to prevent cross-world
// leaks.
name: "WebBluetoothWorldIsolatedCache",
status: "stable",
},
{
name: "WebCodecsVideoEncoderBuffers",
status: "experimental",
},
{
// Adding post-quantum algorithms (ML-DSA, ML-KEM) to WebCrypto.
// Also adding ChaCha20-Poly1305 while we're at it.
//
// https://chromestatus.com/feature/5198951632470016
name: "WebCryptoPQC",
status: "stable",
},
{
name: "WebGLDeveloperExtensions",
public: true,
status: "experimental",
base_feature: "none",
},
{
// Draft WebGL extensions are deliberately not enabled by experimental web
// platform features.
name: "WebGLDraftExtensions",
base_feature: "none",
public: true,
},
{
name: "WebGLDrawingBufferStorage",
status: "stable",
},
{
// Switch WebGL to use an experimental implementation where WebGL calls
// are translated in Blink, via ANGLE, to WebGPU calls. Note that this
// is not marked as "experimental" because it is not an incremental
// addition like other experimental features but a code switch, so we
// don't want to enable it when testing all "experimental Web platform
// features".
name: "WebGLOnWebGPU",
},
{
// WebGL tone mapping support
// https://issues.chromium.org/issues/555806830
// https://chromestatus.com/feature/5424242161221632
name: "WebGLToneMapping",
status: "experimental",
},
{
// WebGPU developer features are deliberately not enabled by experimental
// web platform features.
name: "WebGPUDeveloperFeatures",
base_feature: "none",
public: true,
},
{
// WebGPU experimental features are meant for features that would
// eventually land in the WebGPU spec.
name: "WebGPUExperimentalFeatures",
status: "experimental",
public: true,
},
{
// Enables "chromium-experimental-sampling-resource-table".
name: "WebGPUExperimentalResourceTable",
status: "experimental",
implied_by: ["WebGPUExperimentalFeatures"],
public: true,
},
{
// WebGPU external image copy and import HDR headroom parameter for tone
// mapping.
// https://crbug.com/557320955
// https://chromestatus.com/feature/5147993689948160
name: "WebGPUExternalImageHDRHeadroom",
status: "experimental",
},
{
// Enables GPUBuffer::mapSync for WebGPU.
name: "WebGPUMapSyncOnWorkers",
status: "experimental",
public: true,
},
{
// Allows handling of WebGPU related commands from the GPU process to
// happen on a separate thread. This is a pre-requisite for emulation of
// serialized asynchronous APIs, i.e. mapSync.
name: "WebGPUMultithreadDawnWireOnWorkers",
status: "experimental",
implied_by: ["WebGPUMapSyncOnWorkers"],
},
{
name: "WebHaptics",
status: "experimental",
},
{
name: "WebHID",
status: "stable",
},
{
// It is only enabled in extension environment for now.
name: "WebHIDOnServiceWorkers",
depends_on: ["WebHID"],
base_feature: "none",
public: true,
},
{
// Restricts the sharing of HIDDevice instances across different V8
// worlds (e.g., main world and isolated worlds) to prevent cross-world
// leaks.
name: "WebHIDWorldIsolatedCache",
status: "stable",
},
{
name: "WebIdentityDigitalCredentials",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "WebIdentityDigitalCredentialsCreation",
public: true,
status: "stable",
base_feature: "none",
},
// Kill switch for making BigInt handling in WebIDL use ToBigInt.
{
name: "WebIDLBigIntUsesToBigInt",
status: "stable",
},
{
// Imperative WebMCP: `document.modelContext` and its tool
// registration/execution APIs. See also `DeclarativeWebMCP`.
name: "WebMCP",
origin_trial_feature_name: "WebMCP",
origin_trial_allows_third_party: true,
public: true,
base_feature_status: "enabled",
copied_from_base_feature_if: "overridden",
// Note that `depends_on` isn't supported by origin trials.
implied_by: [
"WebMCPDeclarativeFileInput",
"WebMCPFormAssociatedCustomElements"
],
status: "experimental",
},
{
name: "WebMCPDeclarativeFileInput",
status: "test",
},
{
// Support for form-associated custom elements in declarative
// WebMCP tools.
name: "WebMCPFormAssociatedCustomElements",
status: "experimental",
},
{
name: "WebNFC",
public: true,
status: {"Android": "stable", "iOS": "stable", "default": "test"},
base_feature: "none",
},
{
name: "WebOTP",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "WebOTPAssertionFeaturePolicy",
depends_on: ["WebOTP"],
public: true,
status: "stable",
base_feature: "none",
},
{
// https://wicg.github.io/web-preferences-api/
name: "WebPreferences",
status: "experimental",
},
{
name: "WebPrinting",
status: {"Android": "", "ChromeOS": "stable", "default": "test"},
},
{
// Experimental implementation of
// https://www.ietf.org/archive/id/draft-hancke-tsvwg-snap-00.html
name: "WebRtcSctpSnap",
origin_trial_feature_name: "WebRtcSctpSnap",
status: "experimental",
},
{
// Restricts the sharing of SerialPort instances across different V8
// worlds (e.g., main world and isolated worlds) to prevent cross-world
// leaks.
name: "WebSerialWorldIsolatedCache",
status: "stable",
base_feature: "none",
},
// WebShare is enabled by default on Android (non-WebView), Win, ChromeOS, and Mac.
// This is done in chrome/renderer/chrome_content_renderer_client.cc to prevent
// making the API available to Linux and WebView. Ideally we would set the status
// below to "stable" once we can do so without significant test expectation duplication.
{
name: "WebShare",
public: true,
status: "test",
},
{
name: "WebSocketOptionBag",
status: "experimental",
},
{
name: "WebSocketStream",
status: "stable",
},
{
name: "WebSocketStreamStandardBinaryChunkType",
status: "experimental",
},
{
name: "WebSpeechRecognitionContext",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "experimental",
"default": "",
},
},
{
name: "WebSpeechTimestamps",
status: "experimental",
},
{
name: "WebSpeechUnspokenPunctuation",
status: {
"Win": "stable",
"Mac": "stable",
"Linux": "stable",
"ChromeOS": "stable",
"default": "",
},
},
{
name: "WebTransportAnticipatedConcurrentIncomingStreams",
status: "experimental",
base_feature: "none",
},
{
name: "WebTransportApplicationProtocol",
status: "stable",
base_feature: "none",
},
{
name: "WebTransportCongestionControl",
status: "experimental",
base_feature: "none",
},
{
name: "WebTransportCreateStreamsBeforeReady",
status: "stable",
},
{
name: "WebTransportCustomCertificates",
origin_trial_feature_name: "WebTransportCustomCertificates",
status: "stable",
base_feature: "none",
},
{
name: "WebTransportDatagramsReadableType",
status: "experimental",
},
{
name: "WebTransportDatagramsWritable",
status: "experimental",
base_feature: "none",
depends_on: ["WebTransportSendGroup"],
},
{
name: "WebTransportDraining",
status: "experimental",
},
{
name: "WebTransportExportKeyingMaterial",
status: "experimental",
},
{
name: "WebTransportHeaders",
status: "stable",
base_feature: "none",
},
{
name: "WebTransportReceiveStream",
status: "experimental",
base_feature: "none",
},
{
name: "WebTransportReliability",
status: "stable",
base_feature: "none",
},
{
name: "WebTransportSendGroup",
status: "experimental",
base_feature: "none",
},
{
// Note: enabling this without setting WebTransportCongestionControl to
// either BBRv1 or BBRv2 will produce poor bandwidth estimates.
name: "WebTransportStats",
status: "experimental",
base_feature: "none",
},
{
// Fetches the WebUI code cache from the resource bundle asynchronously
// on a worker thread.
name: "WebUIBundledCodeCacheAsyncFetch",
status: "experimental",
},
{
name: "WebUSB",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "WebUSBOnDedicatedWorkers",
status: "stable",
depends_on: ["WebUSB"],
},
{
// It is only enabled in extension environment for now.
name: "WebUSBOnServiceWorkers",
depends_on: ["WebUSB"],
base_feature: "none",
public: true,
},
{
name: "WebViewEnvReorderFix",
status: "stable",
},
{
// Kill switch for sizing and placing WebVTT cue boxes by the computed
// position alignment instead of the CSS text alignment.
// Spec: https://w3c.github.io/webvtt/#cue-computed-position-alignment
name: "WebVTTCueLayoutByPositionAlignment",
status: "stable",
},
{
// Killswitch for sizing each cue line box using the cue text font
// instead of the text track container font, keeping the cue box tight
// around the rendered cue text.
name: "WebVTTCueTightLineBox",
status: "stable",
},
{
name: "WebVTTLineAndPositionAlignment",
status: "experimental",
// No base::Feature while experimental: avoids a mutable-constant
// binary-size cost on Android. Add one (for the Finch killswitch)
// when this ships.
base_feature: "none",
},
{
name: "WebVTTRegions",
status: "experimental",
},
{
name: "WebXR",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "WebXREnabledFeatures",
depends_on: ["WebXR"],
status: "stable",
},
{
name: "WebXRFrameRate",
depends_on: ["WebXR"],
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebXRFrontFacing",
depends_on: ["WebXR"],
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebXRGPUBinding",
depends_on: ["WebXR"],
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebXRHitTestEntityTypes",
depends_on: ["WebXR"],
status: "experimental",
},
{
name: "WebXRImageTracking",
depends_on: ["WebXR"],
origin_trial_feature_name: "WebXRImageTracking",
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebXRLayers",
depends_on: ["WebXR"],
public: true,
status: "stable",
base_feature: "none",
},
{
name: "WebXRLayersCommon",
implied_by: ["WebXRLayers", "WebXRGPUBinding"],
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebXRMediaBinding",
depends_on: ["WebXRLayers"],
public: true,
status: "experimental",
},
{
name: "WebXRMeshDetection",
depends_on: ["WebXR"],
public: true,
status: "experimental",
},
{
name: "WebXRPlaneDetection",
depends_on: ["WebXR"],
origin_trial_feature_name: "WebXRPlaneDetection",
public: true,
status: "stable",
base_feature: "none",
},
{
name: "WebXRPoseMotionData",
depends_on: ["WebXR"],
public: true,
status: "experimental",
base_feature: "none",
},
{
name: "WebXRSpecParity",
depends_on: ["WebXR"],
public: true,
status: "experimental",
},
{
name: "WebXRVisibilityMask",
depends_on: ["WebXR"],
status: "stable",
},
// Expose the momentum field in mouse wheel events that indicates whether an
// event is synthesized by the platform to simulate scroll inertia after the
// user has ended the physical scroll interaction.
// https://crbug.com/40704952
{
name: "WheelEventMomentum",
status: "stable",
},
// If enabled, window.default[Ss]tatus will be supported. This is disabled
// by default, and is here to allow this behavior to be re-enabled via Finch
// in case of problems. This flag should be removed by Q1 2023, assuming
// no problems are encountered.
{
name: "WindowDefaultStatus",
},
{
name: "WindowOpenAlwaysOnTop",
status: "test",
},
{
// If enabled, "attributionsrc" in window.open() features will not
// disable UI features (avoiding opening as a popup instead of a new tab)
// when Attribution Reporting is disabled/removed. Can be removed once
// kAttributionReportingWindowOpen usage is sufficiently low.
// https://crbug.com/553155942
name: "WindowOpenAttributionSrc",
status: "stable",
},
{
// Fixes an issue where Ctrl+Right Arrow skips punctuation before a newline.
name: "WordSkipSpacesPunctuationFix",
status: "stable",
},
{
// Moving to the Rust parser requires deprecation of the niche feature
// of synchronously including external entities.
// https://crbug.com/455813733
name: "XMLNoExternalEntities",
status: "stable",
},
{
// Replaces lone surrogates in the XML source with U+FFFD so that the
// parser makes a best-effort parse instead of rejecting the whole
// document. This feature acts as a kill switch for
// https://crbug.com/40814739. This flag was shipped in M153, and can be
// removed in M155.
name: "XMLParserReplaceLoneSurrogates",
status: "stable",
},
{
// Switches from XML parsing through libxml2 to parsing XML using the
// Rust xml crate. When an XSL processing instruction is encountered,
// the Rust backend creates an ad-hoc libxml2 xmlDocPtr tree for libxslt
// if XSLT is enabled (e.g. reverse origin trial or CAP alerts).
// https://crbug.com/441911594
name: "XMLParsingRust",
},
{
// Enables the Rust XML parser for situations where we know
// no XSLT processing will be required. This covers usage of
// JS DOMParser API to parse XML, and usage of XMLHttpRequest
// with its responseXML document.
// https://crbug.com/466303347
name: "XMLRustForNonXslt",
status: "stable",
},
{
name: "XMLSerializerConsistentDefaultNsDeclMatching",
status: "test",
},
{
name: "XMLViewerForIframes",
status: "experimental",
},
{
// A feature flag that controls whether XSLT is supported by the browser.
// The current default state is XSLT-enabled. Note that there is a Finch
// trial underway that sets this flag to false for pre-stable channels.
// See XSLTSpecialTrial below.
// crbug.com/435623334.
name: "XSLT",
status: "stable",
public: true,
origin_trial_feature_name: "XSLT",
origin_trial_type: "deprecation",
origin_trial_allows_insecure: true,
origin_trial_allows_third_party: true,
},
{
// A feature flag that will be used for a "special trial" of disabling
// XSLT on pre-stable channels only. This flag does *not* control the
// actual enabled state of XSLT. It merely changes the console error that
// gets emitted if XSLT is disabled. When this flag is true, a "special
// trial run" message is used.
// crbug.com/435623334.
name: "XSLTSpecialTrial",
},
],
}