third_party/blink/renderer/platform/runtime_enabled_features.json5

{
  // 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.
    // * 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/WebLayer, experimental
    // on Windows and not enabled on any other platform.
    //
    // Note that the Android status key implies Chrome for Android, WebView and
    // WebLayer.
    //
    // "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_Ash", "ChromeOS_Lacros", "Mac", "Linux"]
    },

    // "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 the
    // default being false.
    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: {
      valid_type: "str",
      default: "",
    },

    // Specifiy 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 is used only if base_feature is not empty.
    //
    // * "enabled_or_overridden"
    // - If the base::Feature default is overridden by field trial or command
    //   line, set Blink feature to the state of the base::Feature;
    // - Otherwise if the base::Feature is enabled, enable the Blink feature.
    // - Otherwise no change.
    //
    // * "overridden"
    //   Enables the Blink feature when the base::Feature is overridden 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.
    //
    //   This is useful for Blink origin trial features especially those
    //   implemented in both Chromium and Blink. As origin trial only controls
    //   the Blink features, for now we require the base::Feature to be enabled
    //   by default, but we don't want the default enabled status affect the
    //   Blink feature. 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.
    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.
    browser_process_read_write_access: {
      default: false,
      value_type: "bool",
    },

    override_from_pref: {
      valid_keys: [
        // Chrome Prefs name (string) from which we will conditionally override
        // the runtime feature value.
        "name",
        // If the preference equals the provided integral, string, or boolean
        // value, the feature will be force enabled.
        "force_enable_val",
        // If the preference equals the provided integral, string, or
        // boolean value, the feature will be force disabled.
        "force_disable_val",
        // Short-hand boolean flag. If true, will always override
        // the feature. The specified Chrome Pref must be boolean.
        "override_from_boolean_val",
      ],
    }
  },

  data: [
    {
      name: "AbortSignalAny",
      status: "experimental",
      depends_on: ["AbortSignalComposition"]
    },
    {
      name: "AbortSignalComposition",
      status: "stable"
    },
    {
      name: "Accelerated2dCanvas",
      settable_from_internals: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "AcceleratedSmallCanvases",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "AccessibilityAriaVirtualContent",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AccessibilityEagerAXTreeUpdate",
      status: "stable",
    },
    {
      name: "AccessibilityExposeDisplayNone",
      status: "test",
      base_feature: "none",
    },
    {
      name: "AccessibilityExposeHTMLElement",
      base_feature: "none",
      public: true,
    },
    {
      name: "AccessibilityExposeIgnoredNodes",
      base_feature: "none",
      public: true,
    },
    {
      name: "AccessibilityObjectModel",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AccessibilityPageZoom",
      base_feature: "none",
      public: true,
    },
    {
      name: "AccessibilityUseAXPositionForDocumentMarkers",
      base_feature: "none",
      public: true,
    },
    {
      name: "AccordionPattern",
      status: "experimental",
    },
    {
      name: "AddIdentityInCanMakePaymentEvent",
      origin_trial_allows_third_party: true,
      origin_trial_feature_name: "AddIdentityInCanMakePaymentEvent",
      public: true,
    },
    {
      name: "AddressSpace",
      status: "experimental",
      implied_by: ["CorsRFC1918"],
      base_feature: "none",
    },
    {
      // Interest Group JS API/runtimeflag.
      name: "AdInterestGroupAPI",
      origin_trial_feature_name: "AdInterestGroupAPI",
      implied_by: ["Fledge", "Parakeet"],
    },
    {
      name: "AdTagging",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "AllowContentInitiatedDataUrlNavigations",
      base_feature: "none",
    },
    {
      name: "AllowURNsInIframes",
      base_feature: "none",
    },
    {
      name: "AndroidDownloadableFontsMatching",
      base_feature: "none",
      public: true,
    },
    {
      name: "AnimationWorklet",
      base_feature: "none",
    },
    {
      name: "AnonymousIframe",
      origin_trial_allows_third_party: true,
      origin_trial_feature_name: "AnonymousIframeOriginTrial",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "AOMAriaRelationshipProperties",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AttributionReporting",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AttributionReportingCrossAppWeb",
      origin_trial_feature_name: "AttributionReportingCrossAppWeb",
      origin_trial_allows_third_party: true,
      base_feature: "none",
      browser_process_read_access: true,
    },
    {
      // This only exists so we can use RuntimeEnabled in the IDL file
      // when either implied_by flag is enabled.
      name: "AttributionReportingInterface",
      // This is not going into origin trial, "origin_trial_feature_name" is
      // required for using the "implied_by" behaviour.
      origin_trial_feature_name: "AttributionReportingInterface",
      origin_trial_allows_third_party: true,
      implied_by: ["AttributionReporting", "AttributionReportingCrossAppWeb"],
      base_feature: "none",
    },
    {
      name: "AudioContextSetSinkId",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "AudioOutputDevices",
      // Android does not yet support switching of audio output devices
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "AudioVideoTracks",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AutoDarkMode",
      base_feature: "none",
      origin_trial_feature_name: "AutoDarkMode",
    },
    {
      name: "AutoDisableAccessibilityV2",
      base_feature: "none",
      public: true,
    },
    {
      // Makes autofill look across shadow boundaries when collecting form
      // controls to fill.
      name: "AutofillShadowDOM",
      status: "stable",
    },
    {
      name: "AutomationControlled",
      base_feature: "none",
      public: true,
      settable_from_internals: true,
    },
    {
      // Flag set by the media::kAutoplayIgnoreWebAudio feature flag.
      name: "AutoplayIgnoresWebAudio",
      base_feature: "none",
      public: true,
      settable_from_internals: true,
    },
    // 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: "experimental",
      origin_trial_feature_name: "BackForwardCacheNotRestoredReasons",
      base_feature: "BackForwardCacheSendNotRestoredReasons",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "BackgroundFetch",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "BarcodeDetector",
      status: {
        // Built-in barcode detection APIs are only available from some
        // platforms. See //services/shape_detection.
        "Android": "stable",
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "stable",
        "Mac": "stable",
        "default": "test",
      },
      base_feature: "none",
    },
    {
      // https://github.com/WICG/display-locking/blob/master/explainer-beforematch.md
      name: "BeforeMatchEvent",
      origin_trial_feature_name: "BeforeMatchEvent",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "BeforeunloadEventCancelByPreventDefault",
      status: "experimental",
      public: true,
    },
    {
      name: "BidiCaretAffinity",
      base_feature: "none",
    },
    {
      name: "BlinkExtensionChromeOS",
      base_feature: "none",
    },
    {
      name: "BlinkExtensionChromeOSHID",
      depends_on: ["BlinkExtensionChromeOS"],
      base_feature: "none",
    },
    {
      name: "BlinkExtensionChromeOSTelemetry",
      depends_on: ["BlinkExtensionChromeOS"],
      base_feature: "none",
    },
    {
      name: "BlinkExtensionChromeOSWindowManagement",
      depends_on: ["BlinkExtensionChromeOS"],
      base_feature: "none",
    },
    {
      name: "BlinkLifecycleScriptForbidden",
    },
    {
      name: "BlinkRuntimeCallStats",
      base_feature: "none",
    },
    {
      // https://html.spec.whatwg.org/multipage/urls-and-fetching.html#blocking-attributes
      name: "BlockingAttribute",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "BlockingFocusWithoutUserActivation",
      status: "experimental",
    },
    {
      name: "BrowserVerifiedUserActivationKeyboard",
      base_feature: "none",
      public: true,
    },
    {
      name: "BrowserVerifiedUserActivationMouse",
      base_feature: "none",
      public: true,
    },
    {
      name: "ByobFetch",
      status: "experimental",
    },
    {
      name: "CacheStorageCodeCacheHint",
      origin_trial_feature_name: "CacheStorageCodeCacheHint",
      status: "experimental",
      base_feature: "none",
    },
    {
      // If set, the parser will canonicalize whitespace strings.
      name: "CanonicalizeWhitespaceStrings",
      status: "stable",
    },
    {
      name: "Canvas2dCanvasFilter",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "Canvas2dImageChromium",
      base_feature: "none",
      public: true,
    },
    {
      name: "Canvas2dLayers",
      base_feature: "none",
    },
    {
      name: "Canvas2dScrollPathIntoView",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CanvasFloatingPoint",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CanvasHDR",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CanvasImageSmoothing",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CapabilityDelegationDisplayCaptureRequest",
      status: "experimental",
    },
    {
      name: "CapabilityDelegationFullscreenRequest",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CaptureController",
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "CaptureHandle",
      depends_on: ["GetDisplayMedia"],
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "checkVisibility",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ClickToCapturedPointer",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ClientHintsMetaEquivDelegateCH",
      status: "stable",
    },
    {
      name: "ClientHintsMetaHTTPEquivAcceptCH",
      status: "stable",
    },
    {
      name: "ClientHintThirdPartyDelegation",
      status: "stable",
    },
    {
      // Allows read/write of custom formats with unsanitized clipboard content.
      // See crbug.com/106449.
      name: "ClipboardCustomFormats",
      status: "stable",
    },
    {
      name: "ClipboardSvg",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ClipboardUnsanitizedContent",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CloseWatcher",
    },
    {
      name: "CLSScrollAnchoring",
      status: "stable",
    },
    {
      name: "CoepReflection",
      status: "test",
      base_feature: "none",
    },
    {
      name: "CompositeBackgroundAttachmentFixed",
      status: "experimental",
    },
    {
      name: "CompositeBGColorAnimation",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CompositeBoxShadowAnimation",
      base_feature: "none",
    },
    {
      name: "CompositeClipPathAnimation",
      base_feature: "none",
      public: true,
    },
    {
      name: "CompositedSelectionUpdate",
      public: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "CompositeScrollAfterPaint",
      status: "experimental",
    },
    {
      name: "CompressionDictionaryTransport",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
      origin_trial_feature_name: "CompressionDictionaryTransport",
      public: true,
    },
    {
      name: "CompressionDictionaryTransportBackend",
      base_feature_status: "disabled",
      public: true,
    },
    {
      name: "ComputedAccessibilityInfo",
      status: "experimental",
      base_feature: "none",
    },
    {
      // blink::features::kComputePressure is a kill switch for the API. If the
      // feature is disabled, origin trial tokens are ignored.
      name: "ComputePressure",
      origin_trial_feature_name: "ComputePressure_v2",
      status: "experimental",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "ConfirmationOfAction",
      status: "test",
      base_feature: "none",
    },
    {
      name: "ConsolidatedMovementXY",
      base_feature: "none",
      public: true,
    },
    {
      name: "ContactsManager",
      status:  {"Android": "stable", "default": "test"},
      base_feature: "none",
    },
    {
      name: "ContactsManagerExtraProperties",
      status:  {"Android": "stable", "default": "test"},
      base_feature: "none",
    },
    {
      name: "ContentIndex",
      status:  {"Android": "stable", "default": "experimental"},
      base_feature: "none",
    },
    {
      name: "ContentVisibilityAutoStateChangeEvent",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ContextMenu",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CooperativeScheduling",
      base_feature: "none",
      public: true,
    },
    {
      name: "CorsRFC1918",
      base_feature: "none",
    },
    {
      name: "CriticalCHRestartNavigationTiming",
      status: "experimental",
    },
    {
      name: "CrossFramePerformanceTimeline",
      status: "experimental",
    },
    {
      // Allows positioning a positioned element relative to another one.
      // https://drafts.csswg.org/css-anchor-1/
      name: "CSSAnchorPositioning",
      implied_by: ["HTMLSelectMenuElement"],
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSAnimationComposition",
      status: "stable",
      base_feature: "none",
    },
    {
      // Support for the animation-delay-start and animation-delay-end
      // properties.
      //
      // Additionally, animation-delay becomes a shorthand which expands
      // to those properties.
      name: "CSSAnimationDelayStartEnd",
      depends_on: ["ScrollTimeline"],
    },
    {
      // Whether <image> values are allowed as counter style <symbol>
      name: "CSSAtRuleCounterStyleImageSymbols",
      base_feature: "none",
    },
    {
      // https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as
      name: "CSSAtRuleCounterStyleSpeakAsDescriptor",
      status: "test",
      base_feature: "none",
    },
    {
      // https://drafts.csswg.org/css-conditional-4/#support-definition-ext
      // https://github.com/w3c/csswg-drafts/issues/7280#issuecomment-1143852187
      name: "CSSAtSupportsAlwaysNonForgivingParsing",
      status: "stable",
    },
    {
      name: "CSSBaselineSource",
      status: "stable",
    },
    {
      // 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",
      base_feature: "none",
    },
    {
      // Support case-sensitive attribute selector modifier
      // https://drafts.csswg.org/selectors-4/#attribute-case
      name: "CSSCaseSensitiveSelector",
      status: "test",
      base_feature: "none",
    },
    {
      name: "CSSColorContrast",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSColorTypedOM",
      status: "experimental",
      base_feature: "none",
    },
    // Ablation study to try to measure very roughly memory savings from not saving
    // pretokenized strings in CSS custom properties.
    {
      name: "CSSCustomPropertiesAblation",
      // Off by default.
    },
    {
      name: "CSSDisplayAnimation",
      status: "experimental",
    },
    {
      // crbug.com/995106
      name: "CSSDisplayMultipleValues",
      status: "stable",
    },
    // Exists so that we can run a reverse-Finch experiment to assess its performance.
    {
      name: "CSSEasySelectors",
      status: "stable",
    },
    {
      // Include custom properties in CSSComputedStyleDeclaration::item/length.
      // https://crbug.com/949807
      name: "CSSEnumeratedCustomProperties",
      status: "test",
      base_feature: "none",
    },
    {
      name: "CSSExponentialFunctions",
      status: "experimental",
    },
    {
      name: "CSSFocusVisible",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSFoldables",
      status: "experimental",
      base_feature: "none",
    },
    {
      // @font-face Font property descriptors auto range.
      // https://www.w3.org/TR/css-fonts-4/#font-prop-desc
      name: "CSSFontFaceAutoVariableRange",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSFontFaceSrcTechParsing",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSFontFamilyMath",
      status: "stable",
      implied_by: ["MathMLCore"],
      base_feature: "none",
    },
    {
      name: "CSSFontSizeAdjust",
      status: "test",
      base_feature: "none",
    },
    {
      name: "CSSGridTemplatePropertyInterpolation",
      status: "stable",
      base_feature: "none",
    },
    {
      // 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",
      base_feature: "none",
    },
    {
      // crbug.com/924069
      name: "CSSHyphenateLimitChars",
      status: "stable",
      base_feature: "CSSHyphenateLimitChars",
    },
    {
      // If enabled,
      // image-set values without the `-webkit-` prefix
      // will be parsed.
      name: "CSSImageSet",
      status: "stable",
    },
    {
      name: "CSSIndependentTransformProperties",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSInitialPseudo",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSLayoutAPI",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSLinearTimingFunction",
      status: "stable"
    },
    {
      name: "CSSLogical",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSLogicalOverflow",
      status: "test",
      base_feature: "none",
    },
    {
      name: "CSSMarkerNestedPseudoElement",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSMathDepth",
      status: "stable",
      implied_by: ["MathMLCore"],
      base_feature: "none",
    },
    {
      name: "CSSMathShift",
      status: "stable",
      implied_by: ["MathMLCore"],
      base_feature: "none",
    },
    {
      name: "CSSMathStyle",
      status: "stable",
      implied_by: ["MathMLCore"],
      base_feature: "none",
    },
    {
      name: "CSSMathVariant",
      status: "stable",
      implied_by: ["MathMLCore"],
      base_feature: "none",
    },
    {
      name: "CSSMixBlendModePlusLighter",
      status: "stable",
      base_feature: "none",
    },
    {
      // Support for CSS Nesting Level 1.
      //
      // https://csswg.sesse.net/css-nesting-1/
      name: "CSSNesting",
      status: "stable",
    },
    {
      // Support nested selectors that start with idents.
      name: "CSSNestingIdent",
    },
    {
      name: "CSSObjectViewBox",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPathBasicShapesCircleAndEllipse",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPathBasicShapesRectanglesAndPolygon",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPathCoordBox",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPathRay",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPathRayContain",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPathUrl",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOffsetPositionAnchor",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSOverflowForReplacedElements",
      status: "stable",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "CSSOverflowMediaFeatures",
      status: "stable",
    },
    {
      name: "CSSPaintAPIArguments",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Use the new CSS-based painting for spelling and grammar errors,
      // regardless of whether the new highlights or decorations are exposed
      // to authors (see CSSSpellingGrammarErrors).
      name: "CSSPaintingForSpellingGrammarErrors",
      status: "experimental",
      base_feature: "CssPaintingForSpellingGrammarErrors",
    },
    {
      name: "CSSPictureInPicture",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSPositionStickyStaticScrollPosition",
      status: "test",
      base_feature: "none",
    },
    {
      name: "CSSPseudoDir",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSPseudoHasNonForgivingParsing",
      status: "stable",
    },
    {
      // When an audio, video, or similar resource is "playing"
      // or "paused".
      // https://www.w3.org/TR/selectors-4/#video-state
      name: "CSSPseudoPlayingPaused",
      status: "test",
      base_feature: "none",
    },
    {
      // https://drafts.csswg.org/css-cascade-6/#scoped-styles
      name: "CSSScope",
      status: "experimental",
      base_feature: "none",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2
      name: "CSSScrollSnap2",
      status: "test",
    },
    {
      name: "CSSSelectorFragmentAnchor",
      status: "experimental",
      base_feature: "CssSelectorFragmentAnchor",
    },
    {
      // Support for :nth-child(An + B of S).
      //
      // https://drafts.csswg.org/selectors-4/#the-nth-child-pseudo
      name: "CSSSelectorNthChildComplexSelector",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSSignRelatedFunctions",
      status: "experimental",
    },
    {
      // Support for CSS ::spelling-error, ::grammar-error, and the
      // spelling-error and grammar-error values in text-decoration-line.
      //
      // https://drafts.csswg.org/css-pseudo-4/#selectordef-spelling-error
      // https://drafts.csswg.org/css-pseudo-4/#selectordef-grammar-error
      // https://drafts.csswg.org/css-text-decor-4/#valdef-text-decoration-line-spelling-error
      // https://drafts.csswg.org/css-text-decor-4/#valdef-text-decoration-line-grammar-error
      name: "CSSSpellingGrammarErrors",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Explainer: https://drafts.csswg.org/css-values/#round-func
      name: "CSSSteppedValueFunctions",
      status: "experimental",
    },
    {
      name: "CSSStickyContainerQueries",
      status: "experimental",
    },
    {
      // https://drafts.csswg.org/css-contain-3/#style-container
      // This flag is for querying custom properties only.
      name: "CSSStyleQueries",
      status: "stable",
      base_feature: "none",
    },
    {
      // Support style() queries that evaluate in a boolean context.
      name: "CSSStyleQueriesBoolean",
      status: "stable",
    },
    {
      // Merge multiple rulesets into one, for faster matching.
      name: "CSSSuperRulesets",
      status: "experimental",
    },
    {
      name: "CSSSystemAccentColor",
      status: "experimental",
    },
    {
      // TODO(https://crbug.com/1411581):
      // https://w3c.github.io/csswg-drafts/css-inline-3/#propdef-leading-trim
      name: "CSSTextBoxTrim",
      status: "test",
    },
    // `text-wrap: balance`. crbug.com/1251079
    {
      name: "CSSTextWrap",
      status: "stable",
    },
    // Use the `NGSCoreLineBreaker` for `text-wrap: balance`. crbug.com/1451205
    {
      name: "CSSTextWrapBalanceByScore",
      depends_on: ["CSSTextWrapPretty"],
    },
    // `text-wrap: pretty`. crbug.com/1432798
    {
      name: "CSSTextWrapPretty",
      status: "experimental",
      depends_on: ["CSSTextWrap", "CSSWhiteSpaceShorthand"],
    },
    // Support for CSS Toggles, https://tabatkins.github.io/css-toggle/
    {
      name: "CSSToggles",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Support for transitioning top layer elements out of the top layer by
      // allowing the new CSS overlay property to keep the element in the top
      // layer with transition-name: overlay. Also, the HTML implementation is
      // deferring removal of top layer elements from the top layer until the
      // overlay property computes to 'none'.
      //
      // See: https://github.com/w3c/csswg-drafts/issues/8189
      name: "CSSTopLayerForTransitions",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CSSTransitionDiscrete",
      status: "experimental",
    },
    {
      // A kill switch for the fix for part of https://crbug.com/1180387 .
      // Should be removed after M116 has been stable for a few weeks.
      name: "CSSTranslatePreserveYPercent",
      status: "stable",
    },
    {
      // Support for tree-scoped [1] timeline names (e.g. produced by
      // scroll-timeline).
      //
      // [1] https://drafts.csswg.org/css-scoping-1/#shadow-names
      name: "CSSTreeScopedTimelines",
      base_feature: "none",
    },
    {
      // Explainer: https://github.com/DevSDK/css-trigonometric-functions
      name: "CSSTrigonometricFunctions",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "CSSUpdateMediaFeature",
      status: "stable",
    },
    // Support for `user-select:contain`.
    {
      name: "CSSUserSelectContain",
      status: "test",
      base_feature: "none",
    },
    // Support for registered custom properties with <image> syntax.
    {
      name: "CSSVariables2ImageValues",
      status: "experimental",
    },
    // Support for registered custom properties with <transform-list> and
    // <transform-function> syntax.
    {
      name: "CSSVariables2TransformValues",
      status: "experimental",
    },
    {
      name: "CSSVideoDynamicRangeMediaQueries",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Support for viewport units added by css-values-4.
      //
      // https://drafts.csswg.org/css-values-4/#viewport-relative-units
      name: "CSSViewportUnits4",
      status: "stable",
      base_feature: "none",
    },
    // `white-space` as a shorthand. crbug.com/1417543
    {
      name: "CSSWhiteSpaceShorthand",
      status: "stable",
      depends_on: ["CSSTextWrap"],
    },
    {
      name: "CSSWordBoundaryDetection",
      status: "test",
    },
    {
      name: "CSSZoom",
      status: "stable",
    },
    {
      name: "Database",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "DateInputInlineBlock",
      status: "test",
    },
    {
      name: "DecodeJpeg420ImagesToYUV",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "DecodeLossyWebPImagesToYUV",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "DeflateRawCompressionFormat",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "DelayOutOfViewportLazyImages",
      public: true,
      status: "experimental",
    },
    {
      name: "DelegatedInkTrails",
      status: "stable",
      base_feature: "none",
    },
    // https://github.com/w3c/resource-timing/pull/343
    {
      name: "DeliveryType",
      status: "experimental",
      implied_by: ["SpeculationRulesPrefetchFuture"],
      base_feature: "none",
      origin_trial_feature_name: "DeliveryType",
    },
    {
      name: "DesktopCaptureDisableLocalEchoControl",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "DesktopPWAsSubApps",
      status: "test",
    },
    {
      name: "DeviceAttributes",
      origin_trial_feature_name: "DeviceAttributes",
      origin_trial_os: ["chromeos"],
      origin_trial_allows_third_party: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "DeviceOrientationRequestPermission",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "DevicePosture",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "DialogNewFocusBehavior",
      status: "experimental",
    },
    {
      name: "DigitalGoods",
      origin_trial_feature_name: "DigitalGoodsV2",
      origin_trial_os: ["android", "chromeos"],
      public: true,
      status: {
        "Android": "stable",
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "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_Ash": "stable",
        "ChromeOS_Lacros": "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: "DirectSockets",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "DisableDifferentOriginSubframeDialogSuppression",
      base_feature: "none",
      origin_trial_feature_name: "DisableDifferentOriginSubframeDialogSuppression",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
    },
    {
      name: "DisableHardwareNoiseSuppression",
      origin_trial_feature_name: "DisableHardwareNoiseSuppression",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "DisableSelectAllForEmptyText",
      status: "stable",
    },
    // This feature should only be enabled if
    // DisableThirdPartyStoragePartitioning is enabled, but as
    // DisableThirdPartyStoragePartitioning will be linked to a deprecation
    // trial it isn't possible to set a `depends_on`.
    {
      name: "DisableThirdPartySessionStoragePartitioningAfterGeneralPartitioning",
      origin_trial_feature_name: "DisableThirdPartySessionStoragePartitioningAfterGeneralPartitioning",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      status: "experimental",
      base_feature: "none",
    },
    // This feature will represent the deprecation trial that allows first
    // parties to temporarily use unpartitioned storage in embeds loaded
    // on their site.
    {
      name: "DisableThirdPartyStoragePartitioning",
      origin_trial_feature_name: "DisableThirdPartyStoragePartitioning",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
      status: "experimental",
      base_feature: "none",
      browser_process_read_write_access: true,
    },
    {
      name: "DisplayCutoutAPI",
      base_feature: "none",
      public: true,
    },
    {
      // When a Web application calls getDisplayMedia() and asks for video,
      // allow a hint to be provided as to whether it prefers that a
      // certain surface type be more prominently offered to the user.
      //
      // https://github.com/w3c/mediacapture-screen-share/pull/186/files
      name: "DisplaySurfaceConstraint",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "DocumentCookie",
      base_feature: "none",
    },
    {
      name: "DocumentDomain",
      base_feature: "none",
    },
    {
      name: "DocumentOpenOriginAliasRemoval",
      status: "experimental",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "DocumentOpenSandboxInheritanceRemoval",
      status: "experimental",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "DocumentPictureInPictureAPI",
      origin_trial_feature_name: "DocumentPictureInPictureAPI",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      status: {
        "Android": "",
        "ChromeOS_Lacros": "",
        "default": "experimental",
      },
    },
    {
      name: "DocumentPolicy",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    // Enables the ability to use Document Policy header to control feature
    // DocumentDomain.
    {
      name: "DocumentPolicyDocumentDomain",
      status: "experimental",
      depends_on: ["DocumentPolicy"],
      base_feature: "none",
    },
    {
      name: "DocumentPolicyNegotiation",
      origin_trial_feature_name: "DocumentPolicyNegotiation",
      public: true,
      status: "experimental",
      depends_on: ["DocumentPolicy"],
      base_feature: "none",
    },
    // Enables the ability to use Document Policy header to control feature
    // SyncXHR.
    {
      name: "DocumentPolicySyncXHR",
      status: "experimental",
      depends_on: ["DocumentPolicy"],
      base_feature: "none",
    },
    {
      name: "DocumentWrite",
      base_feature: "none",
    },
    {
      // Kill-switch for fixes to a bug that detached input elements are retained.
      // See crbug.com/1413100
      name: "DontLeakDetachedInput",
      status: "stable",
    },
    {
      name: "EarlyHintsPreloadForNavigationOptIn",
      origin_trial_feature_name: "EarlyHintsPreloadForNavigation",
      status: "stable",
      base_feature: "none",
    },
    {
      // If enabled, allows web pages to use the experimental EditContext API to
      // better control text input. See crbug.com/999184.
      name: "EditContext",
      status: "experimental",
    },
    {
      // Disables the `white-space` code in `edit_style.cc`.
      // Part of crbug.com/1417543, see crrev.com/c/4289333.
      name: "EditingStyleWhiteSpace",
      status: "stable",
    },
    {
      // Experiment with preventing some instances of mutation XSS
      // by escaping "<" and ">" in attribute values.
      // See: crbug.com/1175016
      name: "EscapeLtGtInAttributes",
      status: "experimental",
    },
    {
      name: "EventTimingInteractionCount",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExperimentalContentSecurityPolicyFeatures",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExperimentalJSProfilerMarkers",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExperimentalPolicies",
      depends_on: ["DocumentPolicy"],
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExposeRenderTimeNonTaoDelayedImage",
      base_feature: "none",
    },
    {
      name: "ExtendedTextMetrics",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExtraWebGLVideoTextureMetadata",
      base_feature: "none",
    },
    {
      name: "EyeDropperAPI",
      status: {
        // EyeDropper UI is available only on Windows, Mac, and Linux. This list
        // should match the supported operating systems for the kEyeDropper
        // base::Feature.
        "Mac": "stable",
        "Win": "stable",
        "Linux": "stable",
      },
      base_feature: "none",
    },
    {
      name: "FaceDetector",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "FakeNoAllocDirectCallForTesting",
      status: "test",
      base_feature: "none",
    },
    {
      name: "FastComparePositions",
      status: "stable",
    },
    {
      name: "FastPositionIterator",
      // Not enabled due to a RTL issue. crbug.com/1421016.
    },
    {
      name: "FeaturePolicyReporting",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "FedCm",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmAuthz",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmAutoReauthn",
      depends_on: ["FedCm"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // This only exists so we can use RuntimeEnabled in the IDL file
      // when either implied_by flag is enabled.
      name: "FedCmIdentityProviderInterface",
      implied_by: ["FedCmIdpSigninStatus", "FedCmUserInfo", "FedCmIdPRegistration", "FedCmAuthz"],
      base_feature: "none",
    },
    {
      name: "FedCmIdPRegistration",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmIdpSigninStatus",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmIdpSignout",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmIframeSupport",
      depends_on: ["FedCm"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmLoginHint",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmMultipleIdentityProviders",
      depends_on: ["FedCm"],
      base_feature: "none",
      public: true,
    },
    {
      name: "FedCmRpContext",
      depends_on: ["FedCm"],
      public: true,
      base_feature: "none",
    },
    {
      name: "FedCmSelectiveDisclosure",
      depends_on: ["FedCm"],
      public: true,
      base_feature: "none",
    },
    {
      name: "FedCmUserInfo",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      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, similar to
      // Portals, as we require the support of the browser process to fully
      // enable the feature. Enabling this runtime enabled feature alone has no
      // effect.
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "FencedFramesAPIChanges",
      // Various new IDL attributes on the <fencedframe> element (such as
      // `config`, `sandbox`, and `allow`).
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "enabled_or_overridden",
    },
    {
      name: "FencedFramesDefaultMode",
      base_feature_status: "disabled",
      copied_from_base_feature_if: "enabled_or_overridden",
      public: true,
    },
    {
      name: "FetchUploadStreaming",
      status: "stable",
      base_feature: "none",
    },
    {
      // 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",
    },
    {
      name: "FileHandlingIcons",
      depends_on: ["FileHandling"],
      status: {"Android": "test", "default": "experimental"},
      base_feature: "none",
    },
    {
      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"],
      base_feature: "none",
    },
    {
      name: "FileSystemAccessAccessHandle",
      status: "stable",
      base_feature: "none",
    },
    {
      // In-development features for the File System Access API.
      name: "FileSystemAccessAPIExperimental",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Non-OPFS File System Access API.
      name: "FileSystemAccessLocal",
      status: {"Android": "test", "default": "stable"},
      base_feature: "none",
    },
    {
      // OPFS File System Access API.
      name: "FileSystemAccessOriginPrivate",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FirstRectForRangeVertical",
      status: "stable",
    },
    {
      name: "FixedElementsDontOverscroll",
      status: "stable",
    },
    {
      name: "Fledge",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
    },
    {
      name: "FledgeBiddingAndAuctionServer",
      base_feature: "none",
      origin_trial_feature_name: "FledgeBiddingAndAuctionServer",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "FluentScrollbars",
      base_feature: "none",
    },
    {
      name: "Focusgroup",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "Focusgroup",
    },
    {
      name: "FocuslessSpatialNavigation",
      base_feature: "none",
      settable_from_internals: true,
    },
    {
      name: "FontAccess",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "FontPaletteAnimation",
    },
    {
      name: "FontSrcLocalMatching",
      base_feature: "none",
      // No status, as the web platform runtime enabled feature is controlled by
      // a Chromium level feature.
    },
    {
      name: "FontVariantAlternates",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FontVariantPosition",
      status: "experimental",
      base_feature: "none",
    },
    {
      // 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",
    },
    {
      name: "ForcedColorsPreserveParentColor",
      status: "stable",
      base_feature: "none",
    },
    {
      // This is used in tests to perform memory measurement without
      // waiting for GC.
      name:"ForceEagerMeasureMemory",
      base_feature: "none",
    },
    {
      // https://github.com/flackr/reduce-motion/blob/main/explainer.md
      name: "ForceReduceMotion",
      base_feature: "none",
    },
    {
      name: "ForceTallerSelectPopup",
      status: {"ChromeOS_Ash": "stable", "ChromeOS_Lacros": "stable"},
      base_feature: "none",
    },
    {
      name: "FormattedText",
      status: "experimental",
      base_feature: "none",
    },
    {
      // TODO(crbug.com/1419161): Remove this feature after M113 has been stable
      // for a few weeks or more. This is a kill switch that, when enabled, goes
      // back to the old behavior, which was to restore the state for <input>
      // and <select> even when they had `autocomplete=off`.
      name: "FormControlRestoreStateIfAutocompleteOff",
    },
    {
      name: "FormControlsVerticalWritingModeDirectionSupport",
    },
    {
      name: "FormControlsVerticalWritingModeSupport",
      status: "experimental",
    },
    {
      name: "FormRelAttribute",
      status: "stable",
    },
    {
      // Bug fix for crbug.com/1429585
      name: "FormStateRestoreCallbackCallWithState",
      status: "stable",
    },
    {
      name: "FractionalScrollOffsets",
      implied_by: ["PercentBasedScrolling"],
      base_feature: "none",
      public: true,
    },
    {
      name: "FreezeFramesOnVisibility",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Enables `fullscreen` windowFeatures parameter in window.open().
      name: "FullscreenPopupWindows",
      status: "experimental",
      base_feature: "FullscreenPopupWindows"
    },
    {
      // If enabled, `window.screen` always provides display dimensions.
      // Otherwise, `window.screen` provides viewport dimensions in fullscreen
      // as a speculative site compatibility measure, because web authors may
      // assume that screen dimensions match window.innerWidth/innerHeight while
      // a page is fullscreen, but that is not always true. crbug.com/1367416
      name: "FullscreenScreenSizeMatchesDisplay",
      status: "stable",
    },
    {
      name: "GamepadButtonAxisEvents",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "GamepadMultitouch",
      status: "experimental",
      public: true,
    },
    {
      name: "GetAllScreensMedia",
      depends_on: ["GetDisplayMedia"],
      public: true,
      status: "test",
    },
    {
      name: "GetDisplayMedia",
      public: true,
      status: {
        "Android": "experimental",
        "default": "stable",
      },
      base_feature: "none",
    },
    {
      name: "GetDisplayMediaRequiresUserActivation",
      depends_on: ["GetDisplayMedia"],
      status: "experimental",
    },
    {
      name: "GroupEffect",
      status: "test",
      base_feature: "none",
    },
    {
      name: "HandwritingRecognition",
      status: {
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "stable",
        "default": "experimental",
      },
      base_feature: "none",
    },
    // HighlightAPI's custom highlights use HighlightInheritance's behavior even
    // if the HighlightInheritance feature is not enabled.
    {
      name: "HighlightAPI",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "HighlightInheritance",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "HighlightOverlayPainting",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "HighlightPointerEvents",
      depends_on: ["HighlightAPI"],
      base_feature: "none",
    },
    {
      name: "HrefTranslate",
      depends_on: ["TranslateService"],
      origin_trial_feature_name: "HrefTranslate",
      status: "stable",
      base_feature: "none",
    },
    {
      // 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",
    },
    {
      // A kill-switch for crbug.com/1412729
      // (enabling the `v` flag for `pattern` RegExps).
      name: "HTMLPatternRegExpUnicodeSets",
      status: "stable",
    },
    {
      // TODO(crbug.com/1307772): Enables the Popover API.
      name: "HTMLPopoverAttribute",
      status: "stable",
      origin_trial_feature_name: "HTMLPopupAttribute",
      implied_by: ["HTMLSelectMenuElement","HTMLPopoverHint"],
    },
    {
      // TODO(crbug.com/1416284): Enables popover=hint functionality.
      name: "HTMLPopoverHint",
      status: "experimental",
    },
    {
      name: "HTMLSelectMenuElement",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "IDBBatchGetAll",
      status:"experimental",
      base_feature: "none",
    },
    {
      name: "IdleDetection",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // TODO(crbug.com/1406358): Remove after the origin trial ends in M113.
      name: "IgnoreCSPInWebPaymentAPI",
      origin_trial_feature_name: "IgnoreCSPInWebPaymentAPI",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "ImplicitRootScroller",
      public: true,
      settable_from_internals: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "IncomingCallNotifications",
    },
    {
      name: "InertAttribute",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "InertDisplayTransition",
      status: "experimental",
    },
    {
      // If a painting bug no longer reproduces with this feature enabled, then
      // the bug is caused by incorrect cull rects.
      name: "InfiniteCullRect",
      base_feature: "none",
    },
    {
      // If enabled, setting innerHTML will use a special fast-path parser.
      name: "InnerHTMLParserFastpath",
      status: "stable",
    },
    {
      // 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",
    },
    {
      name: "InputMultipleFieldsUI",
      // No plan to support complex UI for date/time INPUT types on Android.
      status: {"Android": "test", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "InstalledApp",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "InteroperablePrivateAttribution",
      status: "experimental",
    },
    {
      "name": "IntersectionOptimization",
    },
    {
      name: "KeyboardAccessibleTooltip",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "KeyboardFocusableScrollers",
      status: "experimental",
    },
    {
      name: "LangAttributeAwareFormControlUI",
      base_feature: "none",
      settable_from_internals: true,
    },
    {
      name: "LayoutDisableWebkitBoxSafeAlignment",
      status: "stable",
    },
    {
      name: "LayoutFlexNewColumnAlgorithm",
      status: "stable",
    },
    {
      name: "LayoutFlexNewRowAlgorithm",
      status: "test",
    },
    {
      name: "LayoutFlexSafeAlignment",
      status: "stable",
    },
    {
      name: "LayoutNewTextAreaScrollbar",
      status: "stable",
    },
    {
      // crbug.com/1353190
      name: "LayoutNGNoCopyBack",
      depends_on: ["RemoveConvertToLayerCoords", "ScrollableAreaNoSnapping"],
      status: "test",
    },
    {
      name: "LayoutNGShapeCache",
      status: "test",
      base_feature: "LayoutNGShapeCache",
    },
    {
      name: "LayoutNGSubgrid",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "LazyFrameLoading",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "LazyInitializeMediaControls",
      base_feature: "none",
      public: true,
      // This is enabled by features::kLazyInitializeMediaControls.
    },
    {
      name: "LCPAnimatedImagesWebExposed",
      status: "test",
      base_feature: "none",
    },
    {
      name: "LCPMouseoverHeuristics",
    },
    {
      name: "LCPMultipleUpdatesPerElement",
    },
    {
      name: "LegacyWindowsDWriteFontFallback",
      // Enabled by features::kLegacyWindowsDWriteFontFallback;
      base_feature: "none",
    },
    {
      // A feature to load <input type=image> images even if there is no layout object.
      // This aligns with <img> behavior, but for safety can be disabled with this
      // flag.
      name: "LoadInputImageWithoutObject",
      status: "stable",
      base_feature: "LoadInputImageWithoutObject",
    },
    {
      // Enable AnimationFrameTimingMonitor, which measures long animation
      // frames. Can be used for UKM or for the perofrmance API.
      name: "LongAnimationFrameMonitoring",
      implied_by: ["LongAnimationFrameTiming", "LongAnimationFrameUKM", "LongTaskFromLongAnimationFrame"],
      status: "experimental"
    },
    {
      // Enables long aniamtion frames as a performance API (the
      // "long-animation-frame" timeline entry)
      name: "LongAnimationFrameTiming",
      status: "experimental"
    },
    {
      // Enables long aniamtion frame logging to UKM
      name: "LongAnimationFrameUKM",
      status: "stable"
    },
    {
      // Use LongAnimationFrameMonitor to emit longtask entries
      name: "LongTaskFromLongAnimationFrame"
    },
    {
      name: "MachineLearningCommon",
      implied_by: ["MachineLearningModelLoader", "MachineLearningNeuralNetwork"],
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MachineLearningModelLoader",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MachineLearningNeuralNetwork",
      status: {
        "Win": "experimental",
        "Linux": "experimental",
        "default": "test"
      },
      base_feature: "none",
    },
    {
      name: "ManagedConfiguration",
      status: "stable",
    },
    {
      name: "MathMLCore",
      status: "stable",
    },
    {
      name:"MeasureMemory",
      status:"stable",
      base_feature: "none",
    },
    {
      name: "MediaCapabilitiesDynamicRange",
      status: "test",
      base_feature: "none",
    },
    {
      name: "MediaCapabilitiesEncodingInfo",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MediaCapabilitiesSpatialAudio",
      status: "test",
      base_feature: "none",
    },
    {
      name: "MediaCapture",
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "MediaCaptureBackgroundBlur",
      origin_trial_feature_name: "MediaCaptureBackgroundBlur",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MediaCaptureConfigurationChange",
      origin_trial_feature_name: "MediaCaptureBackgroundBlur",
      status: "experimental",
      implied_by: ["MediaCaptureBackgroundBlur"],
      base_feature: "none",
    },
    // Set to reflect the MediaCastOverlayButton feature.
    {
      name: "MediaCastOverlayButton",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaControlsExpandGesture",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaControlsOverlayPlayButton",
      public: true,
      settable_from_internals: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "MediaElementVolumeGreaterThanOne",
      base_feature: "none",
    },
    // Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.
    {
      name: "MediaEngagementBypassAutoplayPolicies",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaLatencyHint",
      status: "test",
      base_feature: "none",
    },
    {
      name: "MediaQueryNavigationControls",
      base_feature: "none",
    },
    {
      name: "MediaSession",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "MediaSessionSlides",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "MediaSourceExperimental",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MediaSourceExtensionsForWebCodecs",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "MediaSourceExtensionsForWebCodecs",
    },
    {
      name: "MediaSourceNewAbortAndDuration",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MediaStreamTrackTransfer",
      status: "test",
      base_feature: "none",
    },
    // This is enabled by default on Windows only. The only part that's
    // "experimental" is the support on other platforms.
    {
      name: "MiddleClickAutoscroll",
      status: "test",
      base_feature: "none",
    },
    {
      name: "MobileLayoutTheme",
      base_feature: "none",
    },
    {
      name: "MojoJS",
      status: "test",
      base_feature: "none",
    },
    // MojoJSTest is used exclusively in testing environments, whereas MojoJS
    // may also be used elsewhere.
    {
      name: "MojoJSTest",
      status: "test",
      base_feature: "none",
    },
    // crbug.com/1446498: This feature is being used for the deprecation of
    // Mutation Events.
    {
      name: "MutationEvents",
      status: "stable",
    },
    {
      name: "NavigateEventCancelableTraversals",
      status: "stable",
    },
    {
      name: "NavigateEventCommitBehavior",
      status: "experimental",
    },
    {
      name: "NavigationId",
      status: "experimental",
      origin_trial_feature_name: "SoftNavigationHeuristics",
    },
    {
      name: "NavigatorContentUtils",
      // Android does not yet support NavigatorContentUtils.
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "NetInfoConstantType",
    },
    {
      name: "NetInfoDownlinkMax",
      public: true,
      // Only Android, ChromeOS support NetInfo downlinkMax, type and ontypechange now
      status: {
        "Android": "stable",
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "stable",
        "default": "experimental",
      },
      base_feature: "none",
    },
    {
      name: "NodeAsNSResolver",
      status: "stable",
    },
    {
      name: "NoIdleEncodingForWebTests",
      status: "test",
      base_feature: "none",
    },
    // Makes enter/leave Mouse and Pointer Events non-composed as per
    // corresponding specifications.
    {
      name: "NonComposedEnterLeaveEvents",
      public: true,
      status: "stable",
    },
    {
      // Kill switch for crbug.com/1427047 fix.
      // TODO(xiaochengh): Remove in M117.
      name: "NonReentrantFieldSetDisable",
      status: "stable",
    },
    {
      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"},
      base_feature: "none",
    },
    // 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",
    },
    // Origin trial to experiment with No-Vary-Search in Prefetch Cache
    // See crbug.com/1378075. Depends on SpeculationRulesPrefetchProxy to be
    // enabled.
    // On the browser side, the trial needs features::kPrefetchUseContentRefactor
    // enabled. If features::kPrefetchUseContentRefactor is disabled, then
    // the code will behave as if PrefetchNoVarySearch is disabled.
    {
      name: "NoVarySearchPrefetch",
      base_feature: "none",
      origin_trial_feature_name: "NoVarySearchPrefetch",
    },
    {
      name: "OffMainThreadCSSPaint",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "OffscreenCanvasCommit",
      status: "experimental",
      base_feature: "none",
    },
    {
      // TODO(crbug.com/920069): Remove OffsetParentNewSpecBehavior after the
      // feature is in stable with no issues.
      name: "OffsetParentNewSpecBehavior",
      status: "stable",
      public: true,
    },
    {
      name: "OnDeviceChange",
      // Android does not yet support SystemMonitor.
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "OrientationEvent",
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "OriginIsolationHeader",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "OriginPolicy",
      status: "experimental",
      base_feature: "none",
    },

    // 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",
    },
    // 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,
    },
    // 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: "OverflowOverlayAliasesAuto",
      status: "stable",
    },
    {
      name: "OverscrollCustomization",
      status: "experimental",
      base_feature: "none",
    },
    // The following are developer opt-outs and opt-ins for page freezing. If
    // neither is specified then heuristics will be applied to determine whether
    // the page is eligible.
    {
      name: "PageFreezeOptIn",
      base_feature: "none",
      origin_trial_feature_name: "PageFreezeOptIn",
    },
    {
      name: "PageFreezeOptOut",
      base_feature: "none",
      origin_trial_feature_name: "PageFreezeOptOut",
    },
    {
      name: "PagePopup",
      // Android does not have support for PagePopup
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "PaintUnderInvalidationChecking",
      base_feature: "none",
      settable_from_internals: true,
    },
    {
      // PARAKEET ad serving runtime flag/JS API.
      name: "Parakeet",
      origin_trial_feature_name: "Parakeet",
    },
    {
      name: "PartitionedCookies",
      base_feature: "none",
      origin_trial_feature_name: "PartitionedCookies",
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature,
      // net::features::kPartitionedCookies, which needs to be enabled to make
      // the whole feature work.
    },
    // This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.
    {
      name: "PasswordReveal",
      base_feature: "none",
    },
    {
      name: "PaymentApp",
      depends_on: ["PaymentRequest"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    // Desktop only, if enabled PaymentHandler will use the new minimal header UX.
    // See https://crbug.com/1385136.
    {
      name: "PaymentHandlerMinimalHeaderUX",
      origin_trial_feature_name: "PaymentHandlerMinimalHeaderUX",
      origin_trial_allows_third_party: true,
      origin_trial_os: ["win", "mac", "linux", "fuchsia", "chromeos"],
    },
    {
      name: "PaymentInstruments",
      depends_on: ["PaymentApp"],
      base_feature: "none",
    },
    {
      name: "PaymentMethodChangeEvent",
      depends_on: ["PaymentRequest"],
      status: "stable",
      base_feature: "none",
    },
    // PaymentRequest is enabled by default on Android
    {
      name: "PaymentRequest",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PaymentRequestMerchantValidationEvent",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PendingBeaconAPI",
      origin_trial_feature_name: "PendingBeaconAPI",
      origin_trial_allows_third_party: true,
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PercentBasedScrolling",
      base_feature: "none",
      public: true,
      settable_from_internals: true,
    },
    {
      name: "PerformanceManagerInstrumentation",
      base_feature: "none",
      public: true,
    },
    {
      name: "PerformanceNavigateSystemEntropy",
      status: "experimental",
    },
    {
      name: "PeriodicBackgroundSync",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PerMethodCanMakePaymentQuota",
      origin_trial_feature_name: "PerMethodCanMakePaymentQuota",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "Permissions",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    // See https://crbug.com/1324111
    {
      name: "PermissionsPolicyUnload",
      origin_trial_feature_name: "PermissionsPolicyUnload",
      status: "experimental",
    },
    {
      name: "PermissionsRequestRevoke",
      status: "experimental",
      base_feature: "none",
    },
    // This is a reverse OT used for a phased deprecation.
    // https://crbug.com/918374
    {
      name: "PNaCl",
      base_feature: "none",
      origin_trial_feature_name: "PNaCl",
    },
    {
      name: "PointerEventDeviceId",
      status: "test",
    },
    // PopoverDialogDontThrow makes popover and dialog elements stop throwing
    // exceptions when calling their show and hide methods when they are
    // already in their requested state. See https://github.com/whatwg/html/pull/9142
    {
      name: "PopoverDialogDontThrow",
      status: "stable",
    },
    {
      name: "Portals",
      // Portals must be enabled by blink::features::kPortals as we require the
      // support of the browser process to enable the feature. Enabling this
      // feature specifically within blink has no effect. An experimental/test
      // status can only be set here if the default of blink::features::kPortals
      // allows for it.

      // Note that the origin trial paramaters are kept for future OT usage.
      // There is no currently running OT and it is not possible for OT code to
      // enable portals without browser process support.
      origin_trial_feature_name: "Portals",
      origin_trial_os: ["android"],
      public: true,
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "PreciseMemoryInfo",
      base_feature: "none",
      public: true,
    },
    // 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",
      base_feature: "none",
      settable_from_internals: true,
    },
    {
      name: "PrefersReducedData",
      status: "experimental",
      base_feature: "none",
    },
    // This feature is deprecated and we are evangelizing affected sites.
    // See https://crbug.com/346236 for current status.
    {
      name: "PrefixedVideoFullscreen",
      status: "stable",
      base_feature: "none",
    },
    {
      // Attempt to set up paint properties for ancestors when pre-painting a
      // missed descendant, so that paint effects like transforms aren't lost.
      name: "PrePaintAncestorsOfMissedOOF",
      status: "stable",
    },
    {
      // https://crbug.com/1126305
      name: "Prerender2",
      status: "stable",
    },
    {
      name: "Presentation",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PriorityHints",
      status: "stable",
      base_feature: "none",
    },
    // The RTE feature encompasses multiple APIs, including: Attribution
    // Reporting, FLEDGE, Topics and Fenced Frames.
    {
      name: "PrivacySandboxAdsAPIs",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
    },
    {
      name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_feature_name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PrivateNetworkAccessPermissionPrompt",
    },
    {
      name: "PrivateStateTokens",
      // status: "test",
      base_feature: "none",
      origin_trial_feature_name: "TrustTokens",
      origin_trial_allows_third_party: true,
      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: "PushMessaging",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PushMessagingSubscriptionChange",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "QuickIntensiveWakeUpThrottlingAfterLoading",
      status: "stable",
    },
    {
      name: "QuotaChange",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ReadableStreamTeeCloneForBranch2",
      status: "experimental",
    },
    // If enabled, the Accept-Language header will be reduced.
    {
      name: "ReduceAcceptLanguage",
      base_feature: "none",
      origin_trial_feature_name: "ReduceAcceptLanguage"
    },
    {
      // If enabled, the deviceModel will be reduced to "K" and the
      // androidVersion will be reduced to a static "10" string in android
      // User-Agent string.
      name: "ReduceUserAgentAndroidVersionDeviceModel",
      depends_on: ["ReduceUserAgentMinorVersion"],
      status: {"Android": "stable"},
    },
    // 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",
    },
    {
      // If enabled, the platform and oscpu of the User-Agent string will be
      // reduced.
      name: "ReduceUserAgentPlatformOsCpu",
      depends_on: ["ReduceUserAgentMinorVersion"],
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "RegionCapture",
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "RemotePlayback",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "RemotePlaybackBackend",
      settable_from_internals: true,
      // Tracking bug for the implementation: https://crbug.com/728609
      status: {"Android": "stable", "default": ""},
      base_feature: "none",
    },
    {
      // crbug.com/1432839
      name: "RemoveConvertToLayerCoords",
      status: "stable",
    },
    {
      name: "RemoveDanglingMarkupInTarget",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RemoveDataUrlInSvgUse",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RemoveLegacySizeComputation",
      status: "stable",
    },
    {
      name: "RemoveMobileViewportDoubleTap",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // Non-standard appearance values should be removed. This feature removes
      // inner-spin-button, media-slider, media-sliderthumb, media-volume-slider
      // media-volume-sliderthumb, searchfield-cancel-button,
      // sliderthumb-horizontal, sliderthumb-vertical.
      // https://drafts.csswg.org/css-ui-4/#appearance-switching
      name: "RemoveNonStandardAppearanceValue",
      status: "experimental",
    },
    {
      // Non-standard appearance values should be removed. This feature removes
      // slider-vertical.
      // https://drafts.csswg.org/css-ui-4/#appearance-switching
      name: "RemoveNonStandardAppearanceValueSliderVertical",
    },
    {
      name: "RenderBlockingStatus",
      status: "stable",
      base_feature: "none",
    },
    {
      // The renderpriority attribute feature.
      // https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md
      name: "RenderPriorityAttribute",
      base_feature: "none",
    },
    {
      name: "ResourceHintsLeastRestrictiveCSP",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ResourceTimingContentType",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ResourceTimingInterimResponseTimes",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ResourceTimingResponseStatus",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ResourceTimingUseCORSForBodySizes",
      status: "test",
      base_feature: "none",
    },
    {
      name: "RestrictGamepadAccess",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RtcAudioJitterBufferMaxPackets",
      origin_trial_feature_name: "RtcAudioJitterBufferMaxPackets",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RTCEncodedAudioFrameClone",
      status: "experimental",
    },
    {
      name: "RTCEncodedVideoFrameAdditionalMetadata",
      status: "experimental",
    },
    {
      name: "RTCEncodedVideoFrameClone",
      status: "experimental",
    },
    // 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",
    },
    // Enables the use of |RTCRtpTransceiver::setOfferedRtpHeaderExtensions|,
    // |RTCRtpTransceiver::headerExtensionsToOffer|, and
    // |RTCRtpTransceiver::headerExtensionsNegotiated|.
    {
      name: "RTCRtpHeaderExtensionControl",
      status: "experimental",
      base_feature: "none",
    },
    {
      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",
    },
    {
      name: "SanitizerAPI",
      status: "experimental",
    },
    {
      name: "SaveAsWithDeclarativeShadowDOM",
      status: "stable",
    },
    {
      name: "SchedulerYield",
      origin_trial_feature_name: "SchedulerYield",
      depends_on: ["AbortSignalComposition"],
      status: "experimental",
    },
    {
      // https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries
      name: "ScopedCustomElementRegistry",
      status: "test",
      base_feature: "none",
    },
    // 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",
    },
    {
      name: "ScriptElementSupports",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ScrollableAreaNoSnapping",
      status: "stable",
    },
    {
      name: "ScrollbarColor",
      status: "test",
    },
    {
      name: "ScrollbarWidth",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ScrollCustomization",
      base_feature: "none",
    },
    {
      name: "ScrollEndEvents",
      status: "stable",
    },
    {
      name: "ScrollTimeline",
      status: "stable",
      implied_by: ["AnimationWorklet", "ScrollTimelineCurrentTime"]
    },
    {
      // Support for scroll/view-timeline-attachment.
      //
      // This feature was intially specified in scroll-animations-1,
      // but was since removed by a resolution in Issue 7759.
      //
      // The properties will remain available behind this flag until
      // all WPTs are adjusted to the new API (see feature TimelineScope).
      //
      // https://github.com/w3c/csswg-drafts/issues/7759
      // https://crbug.com/1446702
      name: "ScrollTimelineAttachment"
    },
    {
      // Separate flag for crbug.com/1426506 (getCurrentTime API change) which
      // is expected to land after the initial launch of ScrollTimeline.
      name: "ScrollTimelineCurrentTime",
      status: "experimental"
    },
    // Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
    // as per the spec, matching other Web engines.
    {
      name: "ScrollTopLeftInterop",
      status: "stable",
      base_feature: "none",
    },
    // 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",
    },
    {
      name: "SecurePaymentConfirmationAllowOneActivationlessShow",
      public: true,
      status: "test",
    },
    {
      name: "SecurePaymentConfirmationDebug",
      base_feature: "none",
      public: true,
    },
    {
      name: "SecurePaymentConfirmationOptOut",
      origin_trial_feature_name: "SecurePaymentConfirmationOptOut",
      origin_trial_allows_third_party: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "SendBeaconThrowForBlobWithNonSimpleType",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "SendFullUserAgentAfterReduction",
      base_feature: "none",
      origin_trial_feature_name: "SendFullUserAgentAfterReduction",
      origin_trial_allows_third_party: true
    },
    {
      name: "SendMouseEventsDisabledFormControls",
      status: "experimental",
      public: true,
    },
    {
      name: "SensorExtraClasses",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "Serial",
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "SerializeViewTransitionStateInSPA",
      base_feature: "none",
    },
    {
      name: "ServiceWorkerBypassFetchHandler",
      base_feature: "none",
      origin_trial_feature_name: "ServiceWorkerBypassFetchHandlerForMainResource",
      public: true,
    },
    {
      name: "ServiceWorkerClientLifecycleState",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ServiceWorkerRaceNetworkRequest",
      base_feature: "none",
      origin_trial_feature_name: "ServiceWorkerBypassFetchHandlerWithRaceNetworkRequest",
      public: true,
    },
    {
      name: "SharedArrayBuffer",
      base_feature: "none",
      public: true,
    },
    {
      name: "SharedArrayBufferOnDesktop",
      base_feature: "none",
      public: true,
    },
    {
      name: "SharedArrayBufferUnrestrictedAccessAllowed",
      base_feature: "none",
      public: true,
    },
    {
      name: "SharedAutofill",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "SharedStorageAPI",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "SharedWorker",
      public: true,
      // Android does not yet support SharedWorker. crbug.com/154571
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "SignatureBasedIntegrity",
      origin_trial_feature_name: "SignatureBasedIntegrity",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "SiteInitiatedMirroring",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "SkipAd",
      depends_on: ["MediaSession"],
      status: "experimental",
      base_feature: "none",
    },
    {
      // 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",
    },
    {
      name: "SmartCard",
      status: {"Android": "", "default": "test"},
    },
    {
      // If enabled Border, Outline and Column-Rule Widths
      // will be pixel snapped before layout.
      name: "SnapBorderWidthsBeforeLayout",
      status: "stable",
    },
    {
      name: "SoftNavigationHeuristics",
      status: "experimental",
      depends_on: ["NavigationId"],
      origin_trial_feature_name: "SoftNavigationHeuristics",
    },
    {
      name: "SolidColorLayers",
    },
    // An origin trial feature name is required for this, even though it's
    // actually enabled by the more specific trial. Having these as separate
    // features will allow Blink to distinguish for which thing the trial
    // was enabled.
    {
      name: "SpeculationRules",
      status: "stable",
      base_feature: "none",
      implied_by: ["SpeculationRulesPrefetchProxy", "SpeculationRulesPrefetchWithSubresources", "Prerender2", "SpeculationRulesDocumentRules", "SpeculationRulesRelativeToDocument"],
      origin_trial_feature_name: "SpeculationRules__DONOTUSE",
    },
    {
      name: "SpeculationRulesDocumentRules",
      base_feature: "none",
      origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "SpeculationRulesDocumentRulesSelectorMatches",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
      origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "SpeculationRulesEagerness",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
      origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
      origin_trial_allows_third_party: true,
      status: "experimental",
      implied_by: ["SpeculationRulesNoVarySearchHint"],
    },
    {
      name: "SpeculationRulesFetchFromHeader",
      base_feature: "none",
      origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "SpeculationRulesNoVarySearchHint",
      base_feature: "none",
      origin_trial_feature_name: "NoVarySearchPrefetch",
    },
    {
      name: "SpeculationRulesPointerDownHeuristics",
      base_feature_status: "enabled",
    },
    {
      name: "SpeculationRulesPointerHoverHeuristics",
      base_feature_status: "enabled",
    },
    // This feature exists solely to be the target of implied_by for features
    // that are part of this trial but which may also be enabled another way.
    // Otherwise, runtime-enabled features can be added to the origin trial
    // with the following:
    //   origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
    //   origin_trial_allows_third_party: true,
    {
      name: "SpeculationRulesPrefetchFuture",
      base_feature: "none",
      origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
      origin_trial_allows_third_party: true,
    },
    {
      name: "SpeculationRulesPrefetchProxy",
      origin_trial_feature_name: "SpeculationRulesPrefetch",
      status: "stable",
      copied_from_base_feature_if: "overridden",
      implied_by: ["SpeculationRulesPrefetchFuture", "NoVarySearchPrefetch"],
    },
    {
      name: "SpeculationRulesPrefetchWithSubresources",
      base_feature: "none",
    },
    {
      name: "SpeculationRulesRelativeToDocument",
      base_feature: "none",
      origin_trial_feature_name: "SpeculationRulesPrefetchFuture",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "SrcsetMaxDensity",
      base_feature: "none",
    },
    // 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",
    },
    {
      // Enabled when blink::features::kStorageAccessAPI is enabled.
      name: "StorageAccessAPI",
      status: "experimental",
    },
    {
      name: "StorageAccessAPIForOriginExtension",
      public: true,
      status: "test",
      depends_on: ["StorageAccessAPI"],
    },
    {
      name: "StorageBuckets",
      status: "experimental",
      origin_trial_feature_name: "StorageBuckets",
    },
    {
      // Gates the `locks()` method on a storage bucket.
      name: "StorageBucketsLocks",
      status: "experimental",
    },
    {
      name: "StreamingDeclarativeShadowDOM",
      status: "stable",
    },
    {
      name: "StrictMimeTypesForWorkers",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "StylusHandwriting",
      base_feature: "none",
    },
    {
      name: "SupportsFontFormatTech",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "SvgRasterOptimizations",
      status: "experimental",
    },
    {
      name: "SynthesizedKeyboardEventsForAccessibilityActions",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "SystemWakeLock",
      status: "experimental",
      base_feature: "none",
    },
    // For unit tests.
    {
      name: "TestFeature",
      base_feature: "none",
      browser_process_read_write_access: true,
    },
    // For unit tests.
    {
      name: "TestFeatureDependent",
      depends_on: ["TestFeatureImplied"],
      base_feature: "none",
    },
    // For unit tests.
    {
      name: "TestFeatureImplied",
      implied_by: ["TestFeature"],
      base_feature: "none",
    },
    {
      // crbug.com/1008951
      name: "TextDecoratingBox",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "TextDetector",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "TextFragmentAPI",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "TextFragmentIdentifiers",
      origin_trial_feature_name: "TextFragmentIdentifiers",
      public: true,
      status: "stable",
      base_feature: "TextFragmentAnchor",
    },
    {
      name: "TextFragmentTapOpensContextMenu",
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "ThirdPartyCookiesUserBypass",
      status: "experimental",
      base_feature: "none",
      browser_process_read_write_access: true,
    },
    {
      // Support for the timeline-scope property.
      //
      // https://github.com/w3c/csswg-drafts/issues/7759
      name: "TimelineScope",
      status: "experimental",
      depends_on: ["ScrollTimeline"]
    },
    {
      name: "TimerThrottlingForBackgroundTabs",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "TimeZoneChangeEvent",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "TopicsAPI",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "TopicsDocumentAPI",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "TopicsXHR",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      public: true,
    },
    // 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).
    {
      name: "TouchDragAndContextMenu",
      implied_by: ["TouchDragOnShortPress"],
      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.  This feature assumes
    // that TouchDragAndContextMenu is enabled.
    {
      name: "TouchDragOnShortPress",
      base_feature: "none",
    },
    // 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",
    },
    // This is conditionally set if the platform supports translation.
    {
      name: "TranslateService",
      base_feature: "none",
    },
    {
      name: "TrustedTypeBeforePolicyCreationEvent",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "TrustedTypesFromLiteral",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "TrustedTypesUseCodeLike",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "UnclosedFormControlIsInvalid",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Allow unbalanced columns (no implicit breaks), even if the block-size
      // of the multicol container isn't constrained, rather than forcing column
      // balancing in such cases. See crbug.com/1156312
      name: "UnconstrainedColumnFillAuto",
      status: "stable",
    },
    {
      name: "UnexposedTaskIds",
      base_feature: "none",
    },
    // 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"],
    },
    {
      name: "URLPatternCompareComponent",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Makes the global root scrollbars follow the preferred color scheme
      // by default. Please see more details: crbug.com/1423087.
      name: "UsedColorSchemeRootScrollbars",
    },
    {
      name: "UserActivationSameOriginVisibility",
      base_feature: "none",
      public: true,
    },
    {
      name: "UserAgentClientHint",
      status: "stable",
    },
    {
      name: "UserAgentReduction",
      origin_trial_feature_name: "UserAgentReduction",
      origin_trial_allows_third_party: true,
      // iOS not included as it should not send a reduced User-Agent string.
      origin_trial_os: ["android", "chromeos", "fuchsia", "linux", "mac", "win"],
      base_feature: "ReduceUserAgent",
    },
    {
      name: "V8IdleTasks",
      base_feature: "none",
      public: true,
    },
    {
      // Whether a video element should automatically play fullscreen unless
      // 'playsinline' is set.
      name: "VideoAutoFullscreen",
      base_feature: "none",
      settable_from_internals: true,
    },
    {
      name: "VideoFullscreenOrientationLock",
      base_feature: "none",
    },
    {
      name: "VideoPlaybackQuality",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "VideoRotateToFullscreen",
      base_feature: "none",
    },
    {
      name: "VideoTrackGenerator",
      status: "test",
      base_feature: "none",
    },
    {
      name: "VideoTrackGeneratorInWindow",
      status: "test",
      base_feature: "none",
    },
    {
      name: "VideoTrackGeneratorInWorker",
      base_feature: "none",
    },
    {
      name: "ViewportHeightClientHintHeader",
      status: "stable",
    },
    {
      name: "ViewportSegments",
      status: "experimental",
      base_feature: "none",
    },
    {
      // View transitions.
      // See https://www.w3.org/TR/css-view-transitions-1/
      name: "ViewTransition",
      status: "stable",
      implied_by: ["ViewTransitionOnNavigation"],
    },
    {
      // If enabled, ViewTransition API is supported for navigations including
      // cross-document transitions.
      // See https://drafts.csswg.org/css-view-transitions-1/.
      name: "ViewTransitionOnNavigation",
    },
    {
      name: "VisibilityCollapseColumn",
      base_feature: "none",
    },
    {
      name: "VisibilityStateEntry",
      status: "stable",
      base_feature: "none",
    },
    {
      // 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"],
      base_feature: "none",
    },
    {
      // 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",
      base_feature: "none",
    },
    {
      // A kill switch. Please consider removing this after M112.
      name: "WarnSandboxIneffective",
      status: "stable",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "WebAnimationsAPI",
      status: "stable",
      implied_by: ["AnimationWorklet"],
      base_feature: "none",
    },
    {
      name: "WebAnimationsSVG",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebAppDarkMode",
      origin_trial_feature_name: "WebAppDarkModeV2",
      status: "experimental",
      base_feature: "WebAppEnableDarkMode",
    },
    {
      name: "WebAppLaunchHandler",
      origin_trial_feature_name: "Launch Handler",
      status: {"Android": "experimental", "default": "stable"},
      base_feature: "WebAppEnableLaunchHandler",
    },
    {
      name: "WebAppLaunchQueue",
      // This is not going into origin trial, "origin_trial_feature_name" is
      // required for using the "implied_by" behaviour.
      origin_trial_feature_name: "WebAppLaunchQueue",
      implied_by: ["WebAppLaunchHandler", "FileHandling"],
      base_feature: "none",
    },
    {
      name:"WebAppsLockScreen",
      status:"experimental",
      base_feature: "none",
    },
    {
      name: "WebAppTabStrip",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebAppTabStripCustomizations",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebAppTranslations",
      status: "experimental",
      base_feature: "WebAppEnableTranslations",
    },
    {
      // This flag enables the Manifest parser to handle URL Handlers.
      // Also enabled when blink::features::kWebAppEnableUrlHandlers is
      // overridden on the command line (or via chrome://flags).
      name: "WebAppUrlHandling",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "WebAppUrlHandling",
      origin_trial_os: ["win", "mac", "linux"],
    },
    {
      name: "WebAppWindowControlsOverlay",
      origin_trial_feature_name: "WebAppWindowControlsOverlay",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebAssemblyGC",
      origin_trial_feature_name: "WebAssemblyGC",
      status: "experimental",
      base_feature: "none",
    },
    // 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",
      base_feature: "none",
    },
    // When enabled adds the authenticator attachment used for registration and
    // authentication to the public key credential response.
    {
      name: "WebAuthAuthenticatorAttachment",
      status: "test",
      base_feature: "none",
    },
    // https://github.com/w3c/webauthn/pull/1663
    {
      name: "WebAuthenticationDevicePublicKey",
      status: "experimental",
      base_feature: "none",
    },
    // https://w3c.github.io/webauthn/#dom-publickeycredential-tojson
    // https://w3c.github.io/webauthn/#sctn-parseCreationOptionsFromJSON
    // https://w3c.github.io/webauthn/#sctn-parseRequestOptionsFromJSON
    {
      name: "WebAuthenticationJSONSerialization",
      status: "test",
    },
    {
      name: "WebAuthenticationLargeBlobExtension",
      status: "stable",
      base_feature: "none",
    },
    // https://w3c.github.io/webauthn/#prf-extension
    {
      name: "WebAuthenticationPRF",
      status: "stable",
      base_feature: "WebAuthenticationPRFExtension",
    },
    {
      name: "WebAuthenticationRemoteDesktopSupport",
      base_feature: "none",
      public: true,
    },
    // WebBluetooth is enabled by default on Android, ChromeOS, macOS and
    // Windows.
    {
      name: "WebBluetooth",
      public: true,
      status: {
        "Android": "stable",
        "ChromeOS_Ash": "stable", "ChromeOS_Lacros": "stable",
        "Mac": "stable",
        "Win": "stable",
        "default": "experimental",
      },
      base_feature: "none",
    },
    {
      name: "WebBluetoothGetDevices",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebBluetoothScanning",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebBluetoothWatchAdvertisements",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebCodecs",
      status: "stable",
      base_feature: "none",
      origin_trial_feature_name: "WebCodecs"
    },
    {
      name: "WebCodecsDequeueEvent",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebCryptoCurve25519",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebEnvironmentIntegrity",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "WebEnvironmentIntegrity",
    },
    {
      name: "WebFontResizeLCP",
      status: "experimental",
    },
    {
      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: "experimental",
      base_feature: "none",
    },
    {
      name: "WebGLImageChromium",
      base_feature: "none",
      public: true,
    },
    {
      name: "WebGPU",
      base_feature: "none",
      // Note that this isn't enough to enable WebGPU and that access to
      // WebGPU is further gated on the "WebGPUService" feature exposing GPU
      // process access to WebGPU to the renderer process.
      status: "stable",
    },
    {
      // WebGPU developer features are deliberately not enabled by experimental
      // web platform features.
      name: "WebGPUDeveloperFeatures",
      base_feature: "none",
      public: true,
    },
    {
      name: "WebGPUWebCodecs",
      base_feature: "none",
      origin_trial_feature_name: "WebGPUWebCodecs",
      public: true,
      // Make the WebGPUDeveloperFeatures also enabled this OT feature.
      implied_by: ["WebGPUDeveloperFeatures"],
    },
    {
      name: "WebHID",
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      // It is only enabled in extension environment for now.
      name: "WebHIDOnServiceWorkers",
      depends_on: ["WebHID"],
      base_feature: "none",
      public: true,
    },
    {
      name: "WebIdentityMDocs",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    // Legacy ::-webkit-scrollbar* pseudo element styling. Enabled for stable
    // but configurable via WebPreferences.
    {
      name: "WebKitScrollbarStyling",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebNFC",
      public: true,
      status: {"Android": "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",
    },
    {
      name: "WebSerialBluetooth",
      status: "experimental",
      base_feature: "none",
    },
    // WebShare is enabled by default on Android.
    {
      name: "WebShare",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "WebSocketStream",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebTransportCustomCertificates",
      origin_trial_feature_name: "WebTransportCustomCertificates",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebUSB",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebUSBOnDedicatedWorkers",
      status: "stable",
      depends_on: ["WebUSB"],
      base_feature: "none",
    },
    {
      // It is only enabled in extension environment for now.
      name: "WebUSBOnServiceWorkers",
      depends_on: ["WebUSB"],
      base_feature: "none",
      public: true,
    },
    {
      name: "WebViewXRequestedWithDeprecation",
      origin_trial_feature_name: "WebViewXRequestedWithDeprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
      origin_trial_os: ["android"],
      origin_trial_type: "deprecation",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebVTTRegions",
      status: "experimental",
      base_feature: "none",
    },
    {
      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: "WebXRHandInput",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRHitTestEntityTypes",
      depends_on: ["WebXR"],
      status: "experimental",
      base_feature: "none",
    },
    {
      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: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRPlaneDetection",
      depends_on: ["WebXR"],
      origin_trial_feature_name: "WebXRPlaneDetection",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRPoseMotionData",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WGIGamepadTriggerRumble",
      status: "test",
      base_feature: "none",
    },
    // 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",
    },
    // Allows use of `window-management` as an alias for `window-placement`
    // permission. See crbug.com/1328581
    {
      name: "WindowManagementPermissionAlias",
      status: "stable",
    },
    // Allows sites to request fullscreen when the set of screens change.
    {
      name: "WindowPlacementFullscreenOnScreensChange",
      status: "experimental",
    },
    {
      // If enabled, the `getDisplayMedia()` family of APIs will ask for NV12
      // frames, which should trigger a zero-copy path in the tab capture code.
      name: "ZeroCopyTabCapture",
    },
  ],
}