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. These features may be
    //   turned on using the "Experimental Web Platform features" flag in
    //   chrome://flags/#enable-experimental-web-platform-features.
    // * status=test: Enabled in ContentShell for testing, otherwise off.
    // Features without a status are not enabled anywhere by default.
    //
    // Example of the dictionary value use:
    // {
    //   name: "ExampleFeature",
    //   status: {"Android": "stable", "Win": "experimental"},
    // }
    // "ExampleFeature" will be stable on Android/WebView/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", "iOS"]
    },

    // "implied_by" or "depends_on" specifies relationship to other features:
    // * implied_by: ["feature1","feature2",...]
    //   The feature is automatically enabled if any implied_by features is
    //   enabled. To effectively disable the feature, you must disable the
    //   feature and all the implied_by features.
    // * depends_on: ["feature1","feature2",...]
    //   The feature can be enabled only if all depends_on features are enabled.
    // Only one of "implied_by" and "depends_on" can be specified.
    implied_by: {
      default: [],
      valid_type: "list",
    },

    // *DO NOT* specify features that depend on origin trial features.
    // It is NOT supported. As a workaround, you can either specify the same
    // |origin_trial_feature_name| for the feature or add the OT feature to
    // the |implied_by| list.
    // TODO(https://crbug.com/954679): Add support for origin trial features in 'depends_on' list
    depends_on: {
      default: [],
      valid_type: "list",
    },

    // origin_trial_feature_name: "FEATURE_NAME" is used to integrate the
    // feature with the Origin Trials framework. The framework allows the
    // feature to be enabled at runtime on a per-page basis through a signed
    // token for the corresponding feature name. Declaring the
    // origin_trial_feature_name will modify the generation of the static
    // methods in runtime_enabled_features.h/cpp -- the no-parameter version
    // will not be generated, so all callers have to use the version that takes
    // a const FeatureContext* argument.
    origin_trial_feature_name: {
    },
    // origin_trial_os specifies the platforms where the trial is available.
    // The default is empty, meaning all platforms.
    origin_trial_os: {
      default: [],
      valid_type: "list",
    },
    // origin_trial_type specifies the unique type of the trial, when not the
    // usual trial for a new experimental feature.
    origin_trial_type: {
      default: "",
      valid_type: "str",
      valid_values: ["deprecation", "intervention", ""],
    },
    // origin_trial_allows_insecure specifies whether the trial can be enabled
    // in an insecure context, with default being false. This can only be set
    // to true for a "deprecation" type trial.
    origin_trial_allows_insecure: {
      valid_type: "bool",
    },

    // origin_trial_allows_third_party specifies whether the trial can be enabled
    // from third party origins, with default being false.
    origin_trial_allows_third_party: {
      valid_type: "bool",
    },

    // settable_from_internals specifies whether a feature can be set from
    // internals.runtimeFlags, with the default being false.
    settable_from_internals: {
      valid_type: "bool",
    },

    // public specifies whether a feature can be accessed via
    // third_party/blink/public/platform/web_runtime_features.h with dedicated
    // methods. The default is false. This should be rare because
    // WebRuntimeFeatures::EnableFeatureFromString() works in most cases.
    public: {
      valid_type: "bool",
    },

    // Feature policy IDL extended attribute (see crrev.com/2247923004).
    feature_policy: {
    },

    // The string name of a base::Feature. The C++ variable name in
    // blink::features is built with this string by prepending 'k'.
    // As long as this field isn't "none", a base::Feature is automatically
    // generated in features_generated.{h,cc}.  By default the "name" field
    // is used for the feature name, but can be overridden here.
    //
    // The default value of the base::Feature instance is:
    //  base::FEATURE_ENABLED_BY_DEFAULT if 'status' field is 'stable", and
    //  base::FEATURE_DISABLED_BY_DEFAULT otherwise.
    // It can be overridden by 'base_feature_status' field.
    //
    // If the flag should be associated with a feature not in blink::features,
    // we need to specify `base_feature: "none"` and map the features in
    // content/child/runtime_features.cc. `base_feature: "none"` is strongly
    // discouraged if the feature doesn't have an associated base feature
    // because the feature would lack a killswitch controllable via finch.
    base_feature: {
      valid_type: "str",
      default: "",
    },

    // Specify the default value of the base::Feature instance. This field
    // works only if base_feature is not "none".
    // If the field is missing or "", the default value depends on the 'status'
    // field.  See the comment above.
    // "disabled" sets base::FEATURE_DISABLED_BY_DEFAULT, and "enabled" sets
    // base::FEATURE_ENABLED_BY_DEFAULT.
    base_feature_status: {
      valid_type: "str",
      valid_values: ["", "disabled", "enabled"],
      default: "",
    },

    // Specify how the flag value is updated from the base::Feature value. This
    // field 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.
    // TODO(crbug.com/1377000): this feature does not support origin trial
    // tokens provided in HTTP headers. Any tokens provided via HTTP header will
    // be dropped.
    browser_process_read_access: {
      default: false,
      value_type: "bool",
    },

    // browser_process_read_write_access indicates the runtime feature state
    // should be writable in the browserprocess via RuntimeFeatureStateContext.
    // TODO(crbug.com/1377000): this feature does not support origin trial
    // tokens provided in HTTP headers. Any tokens provided via HTTP header will
    // be dropped.
    browser_process_read_write_access: {
      default: false,
      value_type: "bool",
    },
  },

  data: [
    {
      name: "Accelerated2dCanvas",
      settable_from_internals: true,
      status: "stable",
    },
    {
      name: "AcceleratedSmallCanvases",
      status: "stable",
    },
    {
      name: "AccessibilityAriaVirtualContent",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AccessibilityExposeDisplayNone",
      status: "test",
    },
    {
      name: "AccessibilityExposeHTMLElement",
      base_feature: "none",
      public: true,
    },
    {
      name: "AccessibilityObjectModel",
      status: "experimental",
    },
    {
      name: "AccessibilityOSLevelBoldText",
      status: "experimental",
      public: true,
    },
    {
      name: "AccessibilityPageZoom",
      base_feature: "none",
      public: true,
    },
    {
      name: "AccessibilitySerializationSizeMetrics",
      status: "experimental",
    },
    {
      name: "AccessibilityUseAXPositionForDocumentMarkers",
      base_feature: "none",
      public: true,
    },
    {
      name: "AddIdentityInCanMakePaymentEvent",
      origin_trial_allows_third_party: true,
      origin_trial_feature_name: "AddIdentityInCanMakePaymentEvent",
      public: true,
    },
    {
      name: "AddressSpace",
      status: "experimental",
      implied_by: ["CorsRFC1918"],
    },
    {
      // Interest Group JS API/runtimeflag.
      name: "AdInterestGroupAPI",
      origin_trial_feature_name: "AdInterestGroupAPI",
      implied_by: ["Fledge", "Parakeet"],
      public: true,
    },
    {
      name: "AdTagging",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      // crbug.com/1500511
      name: "AlignContentForBlocks",
      status: "stable",
    },
    {
      name: "AllowContentInitiatedDataUrlNavigations",
      base_feature: "none",
    },
    {
      name: "AllowSyntheticTimingForCanvasCapture",
      base_feature: "none",
      status: {
        "Mac": "stable",
        "default": ""
},
    },
    {
      name: "AllowURNsInIframes",
      base_feature: "none",
    },
    {
      name: "AndroidDownloadableFontsMatching",
      base_feature: "none",
      public: true,
    },
    {
      name: "AnimationWorklet",
    },
    {
      name: "AnonymousIframe",
      status: "stable",
    },
    {
      name: "AOMAriaRelationshipProperties",
      public: true,
      status: "experimental",
    },
    {
      name: "AppTitle",
      status: "experimental",
      origin_trial_feature_name: "AppTitle",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      base_feature: "WebAppEnableAppTitle",
    },
    {
      name: "AriaNotify",
      status: "test",
    },
    {
      name: "AsyncClipboardImplicitPermission",
      status: "stable",
    },
    {
      name: "AttributionReporting",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      status: "experimental",
      base_feature: "none",
      public: true,
    },
    {
      name: "AttributionReportingCrossAppWeb",
      origin_trial_feature_name: "AttributionReportingCrossAppWeb",
      origin_trial_allows_third_party: true,
      base_feature: "none",
      public: 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",
    },
    {
      name: "AudioOutputDevices",
      // Android does not yet support switching of audio output devices
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "AudioVideoTracks",
      status: "experimental",
    },
    {
      name: "AutoDarkMode",
      base_feature: "none",
      origin_trial_feature_name: "AutoDarkMode",
    },
    {
      name: "AutomationControlled",
      base_feature: "none",
      public: true,
      settable_from_internals: true,
    },
    {
      name: "AutoPictureInPictureVideoHeuristics",
      status: "experimental",
    },
    {
      // Flag set by the media::kAutoplayIgnoreWebAudio feature flag.
      name: "AutoplayIgnoresWebAudio",
      base_feature: "none",
      public: true,
      settable_from_internals: true,
    },
    {
      // If enabled, lazy loaded images can be auto sized if the sizes
      // attribute is missing or set to auto.
      name: "AutoSizeLazyLoadedImages",
      status: "experimental",
    },
    {
      name: "AvoidCaretVisibleSelectionAdjuster",
      status: "stable",
    },
    {
      name: "BackdropInheritOriginating",
      status: "stable",
    },
    // When enabled, enforces new interoperable semantics for 3D transforms.
    // See crbug.com/1008483.
    {
      name: "BackfaceVisibilityInterop",
    },
    {
      name: "BackForwardCache",
      base_feature: "none",
      public: true,
    },
    {
      name: "BackForwardCacheExperimentHTTPHeader",
      origin_trial_feature_name: "BackForwardCacheExperimentHTTPHeader",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "BackForwardCacheNotRestoredReasons",
      status: "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",
      },
    },
    {
      // There are two different code changes guarded by this feature. Both
      // are about triggering a beforeunload cancel dialog and need adoption
      // from developers.
      // 1. If event.preventDefault() is called, prompt cancel dialog.
      // 2. If event.returnValue is the empty string, do not prompt cancel dialog.
      name: "BeforeunloadEventCancelByPreventDefault",
      status: "stable",
      public: true,
    },
    {
      name: "BidiCaretAffinity",
    },
    {
      name: "BlinkExtensionChromeOS",
      browser_process_read_write_access: true,
    },
    {
      name: "BlinkExtensionChromeOSKiosk",
      depends_on: ["BlinkExtensionChromeOS"],
      browser_process_read_write_access: true,
    },
    {
      name: "BlinkExtensionDiagnostics",
      depends_on: ["BlinkExtensionChromeOS"],
      browser_process_read_write_access: true,
      base_feature: "none",
    },
    {
      name: "BlinkExtensionWebView",
      public: true,
    },
    {
      name: "BlinkExtensionWebViewMediaIntegrity",
      public: true,
    },
    {
      name: "BlinkLifecycleScriptForbidden",
    },
    {
      name: "BlinkRuntimeCallStats",
    },
    {
      name: "BlockingFocusWithoutUserActivation",
      status: "experimental",
    },
    {
      name: "BlockRubyWrappingInlineRuby",
      status: "stable",
    },
    // crbug.com/1147998: Mouse and Pointer boundary event dispatch (i.e. dispatch
    // of enter, leave, over, out events) tracks DOM node removal to fix event
    // pairing on ancestor nodes.
    {
      name: "BoundaryEventDispatchTracksNodeRemoval",
      public: true,
      status: "experimental",
    },
    {
      name: "BrowserVerifiedUserActivationKeyboard",
      base_feature: "none",
      public: true,
    },
    {
      name: "BrowserVerifiedUserActivationMouse",
      base_feature: "none",
      public: true,
    },
    {
      name: "CacheStorageCodeCacheHint",
      origin_trial_feature_name: "CacheStorageCodeCacheHint",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "Canvas2dCanvasFilter",
      status: "experimental",
    },
    {
      name: "Canvas2dImageChromium",
      base_feature: "none",
      public: true,
    },
    {
      name: "Canvas2dLayers",
    },
    {
      name: "Canvas2dMesh",
      status: "test",
    },
    {
      name: "Canvas2dScrollPathIntoView",
      status: "experimental",
    },
    {
      name: "CanvasFloatingPoint",
      status: "experimental",
    },
    {
      name: "CanvasHDR",
      status: "experimental",
    },
    {
      name: "CanvasImageSmoothing",
      status: "experimental",
    },
    {
      name: "CanvasWebGPUAccess",
      status: "experimental",
    },
    {
      name: "CapabilityDelegationDisplayCaptureRequest",
      status: "experimental",
    },
    {
      name: "CaptureController",
      status: {"Android": "", "default": "stable"},
    },
    {
      // TODO(crbug.com/1444712): Before enabling that flag by default,
      // make sure MouseCursorOverlayController does not transmit mouse
      // events to a CaptureController that don't have any
      // capturedmousechange listener attached to it.
      // See https://github.com/screen-share/mouse-events/issues/14
      name: "CapturedMouseEvents",
      "depends_on": ["CaptureController"],
      status: {"Android": "", "default": "test"},
    },
    {
      name: "CapturedSurfaceControl",
      origin_trial_feature_name: "CapturedSurfaceControl",
      status: {"Android": "", "default": "experimental"},
    },
    {
      name: "CaptureHandle",
      depends_on: ["GetDisplayMedia"],
      status: {"Android": "", "default": "stable"},
    },
    {
      // https://www.w3.org/TR/cssom-view-1/#dom-document-caretpositionfrompoint
      name: "CaretPositionFromPoint",
      status: "test",
    },
    {
      // Kill switch for changes to RenderFrameMetadataObserverImpl in connection with Engagement
      // Signals. See https://crrev.com/c/4544201 and https://crbug.com/1458640.
      name: "CCTNewRFMPushBehavior",
      base_feature_status: "enabled",
    },
    {
      name: "CheckVisibilityExtraProperties",
      status: "stable",
    },
    {
      name: "ClickToCapturedPointer",
      status: "experimental",
    },
    {
      name: "ClipboardSvg",
      status: "stable",
    },
    {
      name: "ClipPathRejectEmptyPaths",
      status: "stable",
    },
    {
      // https://html.spec.whatwg.org/multipage/interaction.html#close-requests-and-close-watchers
      name: "CloseWatcher",
      status: "experimental",
    },
    {
      name: "CoepReflection",
      status: "test",
    },
    {
      name: "CompositeBGColorAnimation",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CompositeBoxShadowAnimation",
    },
    {
      name: "CompositeClipPathAnimation",
      public: true,
    },
    {
      name: "CompositedSelectionUpdate",
      public: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "CompositionForegroundMarkers",
      status: {
        "Android": "stable",
        "default": "",
      }
    },
    {
      name: "CompressionDictionaryTransport",
      base_feature: "none",
      origin_trial_feature_name: "CompressionDictionaryTransportV2",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "CompressionDictionaryTransportBackend",
      base_feature: "none",
      public: true,
    },
    {
      name: "ComputedAccessibilityInfo",
      status: "experimental",
    },
    {
      // 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",
      origin_trial_allows_third_party: true,
      status: "experimental",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "ConsolidatedMovementXY",
      base_feature: "none",
      public: true,
    },
    {
      name: "ContactsManager",
      status:  {"Android": "stable", "default": "test"},
    },
    {
      name: "ContactsManagerExtraProperties",
      status:  {"Android": "stable", "default": "test"},
    },
    {
      name: "ContentIndex",
      status:  {"Android": "stable", "default": "experimental"},
    },
    {
      name: "ContextMenu",
      status: "experimental",
    },
    {
      name: "CookieDeprecationFacilitatedTesting",
      base_feature: "none",
    },
    {
      name: "CooperativeScheduling",
      base_feature: "none",
      public: true,
    },
    {
      name: "CoopRestrictProperties",
      origin_trial_feature_name: "CoopRestrictProperties",
      base_feature: "none",
    },
    {
      name: "CorsRFC1918",
    },
    {
      // Controls whether form elements may delay editor creation until layout.
      // This is a kill switch. See https://crbug.com/325613706 for details.
      name: "CreateInputShadowTreeDuringLayout",
      status: "stable"
    },
    {
      name: "CrossFramePerformanceTimeline",
      status: "experimental",
    },
    {
      // Allows positioning a positioned element relative to another one.
      // https://drafts.csswg.org/css-anchor-1/
      name: "CSSAnchorPositioning",
      implied_by: ["HTMLSelectListElement"],
      status: "experimental",
    },
    {
      // Use full cascading for applying @position-try fallback for anchor
      // positioning during layout.
      name: "CSSAnchorPositioningCascadeFallback",
      implied_by: ["CSSAnchorPositioning"],
    },
    {
      // 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",
    },
    {
      // https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as
      name: "CSSAtRuleCounterStyleSpeakAsDescriptor",
      status: "test",
    },
    {
      // https://chromestatus.com/feature/5125388091260928
      name: "CSSBackgroundClipUnprefix",
      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",
    },
    {
      // https://chromestatus.com/feature/5196713071738880
      name: "CSSCalcSizeFunction",
      status: "experimental",
    },
    {
      name: "CSSCapFontUnits",
      status: "stable",
    },
    {
      // Support case-sensitive attribute selector modifier
      // https://drafts.csswg.org/selectors-4/#attribute-case
      name: "CSSCaseSensitiveSelector",
      status: "test",
    },
    {
      name: "CSSColorContrast",
      status: "experimental",
    },
    {
      name: "CSSColorTypedOM",
      status: "experimental",
    },
    {
      name: "CSSComputedStyleFullPseudoElementParser",
      status: "stable",
    },
    {
      name: "CSSContentVisibilityImpliesContainIntrinsicSizeAuto",
      status: "stable",
    },
    {
      // Unprefixed cross-fade() (in addition to the existing -webkit-cross-fade()).
      // https://drafts.csswg.org/css-images-4/#cross-fade-function
      name: "CSSCrossFade",
      status: "experimental",
    },
    {
      // This flag controls whether the deprecated :--foo syntax is enabled. It
      // is being replaced by :state(foo), which is controlled by the
      // CSSCustomStateNewSyntax flag.
      // TODO(crbug.com/1514397): Remove this when the feature is fully launched.
      name: "CSSCustomStateDeprecatedSyntax",
      status: "stable",
    },
    {
      // This flag controls whether the :state(foo) pseudo-class for custom
      // elements is enabled. It is a rename of :--foo, which is being
      // deprecated and is controlled by the CSSCustomStateDeprecatedSyntax
      // flag.
      // TODO(crbug.com/1514397): Remove this when the deprecation is done.
      name: "CSSCustomStateNewSyntax",
      status: "experimental",
    },
    {
      name: "CSSDisplayAnimation",
      status: "stable",
    },
    {
      name: "CSSDisplayModePictureInPicture",
      status: "stable",
    },
    {
      name: "CSSDynamicRangeLimit",
      status: "experimental",
    },
    {
      // Include custom properties in CSSComputedStyleDeclaration::item/length.
      // https://crbug.com/949807
      name: "CSSEnumeratedCustomProperties",
      status: "test",
    },
    {
      name: "CSSExponentialFunctions",
      status: "stable",
    },
    {
      // crbug.com/1447058
      name: "CssFieldSizing",
      status: "stable",
    },
    {
      name: "CSSFirstLetterTextRewrite",
      status: "stable",
    },
    {
      name: "CSSFontSizeAdjust",
      status: "experimental",
    },
    {
      name: "CSSFunctions",
      status: "test",
    },
    {
      // This needs to be kept as a runtime flag as long as we need to forcibly
      // disable it for WebView on Android versions older than P. See
      // https://crrev.com/f311a84728272e30979432e8474089b3db3c67df
      name: "CSSHexAlphaColor",
      status: "stable",
    },
    {
      // https://chromestatus.com/feature/6289894144212992
      name: "CSSKeyframesRuleLength",
      status: "stable",
    },
    {
      name: "CSSLayoutAPI",
      status: "experimental",
    },
    {
      // Support for 'light-dark()' function to select computed color values
      // based on the used color-scheme.
      name: "CSSLightDarkColors",
      status: "stable",
    },

    {
      name: "CSSLinearTimingFunction",
      status: "stable"
    },
    {
      name: "CSSLogicalOverflow",
      status: "test",
    },
    {
      name: "CSSMarkerNestedPseudoElement",
      status: "experimental",
    },
    {
      // Un-prefixed and interoperable mask implementation, including
      // sub-features such as mask-image, mask-mode, etc.
      // Tracking bug: https://crbug.com/1418401
      // Spec: https://drafts.fxtf.org/css-masking/#the-mask
      name: "CSSMaskingInterop",
      status: "stable",
    },
    {
      // Tracked as an experiment to help Search quantify
      // performance improvements.
      name: "CSSMPCImprovements",
      status: "stable",
    },
    {
      // Support for typed om numeric factory methods for various units that
      // were otherwise shipped: rex, rch, ic, ric, lh, rlh, x (cap and rcap
      // covered by separate runtime flag).
      name: "CSSNumericFactoryCompleteness",
      status: "stable",
    },
    {
      name: "CSSOffsetPathBasicShapesCircleAndEllipse",
      status: "stable",
    },
    {
      name: "CSSOffsetPathBasicShapesRectanglesAndPolygon",
      status: "stable",
    },
    {
      name: "CSSOffsetPathCoordBox",
      status: "stable",
    },
    {
      name: "CSSOffsetPathRay",
      status: "stable",
    },
    {
      name: "CSSOffsetPathRayContain",
      status: "stable",
    },
    {
      name: "CSSOffsetPathUrl",
      status: "stable",
    },
    {
      name: "CSSOffsetPositionAnchor",
      status: "stable",
    },
    {
      name: "CSSOverflowMediaFeatures",
      status: "stable",
    },
    {
      name: "CSSPaintAPIArguments",
      status: "experimental",
    },
    {
      // Ignore the stylesheet encoding when parsing URLs, always using UTF-8.
      // See crbug.com/1485525.
      name: "CSSParserIgnoreCharsetForURLs",
    },
    {
      // crbug.com/1443291: Phrase Line Breaking
      name: "CSSPhraseLineBreak",
      status: "stable",
    },
    {
      // Support for the position-fallback-bounds property.
      //
      // This property was part of the CSS Anchor Positioning spec,
      // but was removed at some point. We do however plan to offer
      // something similar in the future [1], and so we're holding
      // on to the implementation for how.
      //
      // [1] https://github.com/w3c/csswg-drafts/issues/9868
      name: "CSSPositionFallbackBounds",
      depends_on: ["CSSAnchorPositioning"],
      status: "test",
    },
    {
      name: "CSSPositionStickyStaticScrollPosition",
      status: "test",
    },
    {
      // Support the position-try-order property. Currently not implied by the
      // anchor positioning feature.
      // https://drafts.csswg.org/css-anchor-position-1/#position-try-order-property
      name: "CSSPositionTryOrder",
      status: "test",
    },
    // https://drafts.csswg.org/css-values-5/#progress
    // progress(), media-progress(), container-progress()
    {
      name: "CSSProgressNotation",
      status: "experimental",
    },
    {
      // Enables the :open and :closed pseudo-selectors.
      // https://chromestatus.com/feature/5085419215781888
      name: "CSSPseudoOpenClosed",
      status: "experimental",
    },
    {
      // When an audio, video, or similar resource is "playing"
      // or "paused".
      // https://www.w3.org/TR/selectors-4/#video-state
      name: "CSSPseudoPlayingPaused",
      status: "test",
    },
    {
      // TODO(crbug.com/40932006): Non-standard 'reading-order-items' keyword
      // for CSS reading of grid and flex layout.
      // https://drafts.csswg.org/css-display-4/#reading-order-items
      name: "CSSReadingOrderItems",
      status: "test",
    },
    {
      // https://drafts.csswg.org/css-color-5/#relative-colors
      name: "CSSRelativeColor",
      status: "stable",
    },
    {
      // Non-standard 'auto' keyword for the CSS resize property. Used for
      // selectively enable resize corner for textarea via UA stylesheet, but
      // unintentionally exposed to author sheets. UA rule is now using
      // -internal-textarea-auto instead.
      name: "CSSResizeAuto",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-cascade-6/#scoped-styles
      name: "CSSScope",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#snap-events
      name: "CSSScrollSnapEvents",
      status: "test",
      implied_by: ["CSSSnapChangedEvent", "CSSSnapChangingEvent"],
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2#scroll-start
      name: "CSSScrollStart",
      status: "test",
    },
    {
      // Flag for supporting scroll-state() and container-type: scroll-state
      // Implied by supporting at least one of the scroll-state query features.
      name: "CSSScrollStateContainerQueries",
      implied_by: ["CSSStickyContainerQueries", "CSSStickyContainerQueries"],
    },
    {
      name: "CSSSelectorFragmentAnchor",
      status: "experimental",
      base_feature: "CssSelectorFragmentAnchor",
    },
    {
      name: "CSSSignRelatedFunctions",
      status: "experimental",
    },
    {
      // A separate feature for testing compatibility, related to the work on
      // https://chromestatus.com/feature/5196713071738880
      name: "CSSSizingKeywordAnimation",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#snap-events
      name: "CSSSnapChangedEvent",
      status: "test",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#snap-events
      name: "CSSSnapChangingEvent",
      status: "test",
    },
    {
      name: "CSSSnapContainerQueries",
      status: "experimental",
    },
    {
      // Explainer: https://drafts.csswg.org/css-values/#round-func
      name: "CSSSteppedValueFunctions",
      status: "experimental",
    },
    {
      name: "CSSStickyContainerQueries",
      status: "experimental",
    },
    {
      name: "CSSSupportsForImportRules",
      status: "stable",
    },
    {
      // The AccentColor And AccentColorText CSS system color keywords
      name: "CSSSystemAccentColor",
      status: "experimental",
    },
    {
      // crbug.com/1463890: CSS `text-autospace` property
      name: "CSSTextAutoSpace",
      status: "experimental",
    },
    {
      // TODO(https://crbug.com/1411581):
      // https://w3c.github.io/csswg-drafts/css-inline-3/#propdef-leading-trim
      name: "CSSTextBoxTrim",
      status: "test",
    },
    {
      // crbug.com/1463890, crbug.com/1463891: CSS `text-spacing` shorthand
      name: "CSSTextSpacing",
      depends_on: ["CSSTextAutoSpace", "CSSTextSpacingTrim"],
    },
    {
      // crbug.com/1463891: CSS `text-spacing-trim` property
      name: "CSSTextSpacingTrim",
      status: "stable",
    },
    // Use the `ScoreLineBreaker` for `text-wrap: balance`. crbug.com/1451205
    {
      name: "CSSTextWrapBalanceByScore",
      status: "stable",
    },
    // `text-wrap: pretty`. crbug.com/1432798
    {
      name: "CSSTextWrapPretty",
      status: "stable",
    },
    {
      name: "CSSTransitionDiscrete",
      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",
    },
    {
      // Container query selectors containing uknown or unsupported queries
      // never selects a container with this feature enabled.
      // For instance, "@container (width > 0px) or (foo: bar)" will never
      // select or match any containers.
      name: "CSSUnknownContainerQueriesNoSelection",
      status: "stable",
    },
    {
      name: "CSSUpdateMediaFeature",
      status: "stable",
    },
    // Support for `user-select:contain`.
    {
      name: "CSSUserSelectContain",
      status: "test",
    },
    // Support for registered custom properties with <image> syntax.
    {
      name: "CSSVariables2ImageValues",
      status: "stable",
    },
    // Support for registered custom properties with <transform-list> and
    // <transform-function> syntax.
    {
      name: "CSSVariables2TransformValues",
      status: "stable",
    },
    {
      name: "CSSVideoDynamicRangeMediaQueries",
      status: "experimental",
    },
    {
      // The view-timeline shorthand includes the view-timeline-inset
      // property.
      //
      // https://github.com/w3c/csswg-drafts/pull/9189
      name: "CSSViewTimelineInsetShorthand",
      status: "stable",
    },
    {
      // https://chromestatus.com/feature/5064894363992064
      name: "CSSViewTransitionClass",
      status: "test"
    },
    {
      // https://html.spec.whatwg.org/#dom-customelementregistry-getname
      name: "CustomElementsGetName",
      status: "stable",
    },
    {
      name: "Database",
      public: true,
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "WebSQL",
      origin_trial_allows_third_party: true,
      origin_trial_type: "deprecation",
    },
    {
      // Makes the default display value of date type <input> elements
      // inline-block for cross-browser compatibility. Enabled in M122, should
      // be safe to remove in M126.
      name: "DateInputInlineBlock",
      status: "stable",
    },
    {
      // This is a killswitch for the `serializable` attribute on declarative
      // shadow roots. It should be removed in M125 (March 18, 2024) assuming
      // no issues are encountered.
      name: "DeclarativeShadowDOMSerializable",
      status: "stable",
    },
    {
      // This is a killswitch (enabled by *enabling* the feature) for the
      // removal of the IDL reflection of the old 'shadowroot' attribute.
      // This should be removed in M124 (Feb 20, 2024) assuming no issues.
      name: "DeprecatedTemplateShadowRoot",
    },
    // This allows pages to opt out of the unload deprecation. Enabling this
    // allows unload event handers to be used in the frame regardless of any
    // Permissions-Policy setting.
    // https://crbug.com/1432116
    {
      name: "DeprecateUnloadOptOut",
      origin_trial_feature_name: "DeprecateUnloadOptOut",
      origin_trial_type: "deprecation",
      origin_trial_allows_third_party: true,
      origin_trial_allows_insecure: true,
    },
    {
      name: "DesktopCaptureDisableLocalEchoControl",
      status: "experimental",
    },
    {
      name: "DesktopPWAsAdditionalWindowingControls",
      status: "test",
    },
    {
      name: "DesktopPWAsSubApps",
      status: "test",
    },
    {
      name: "DetailsStyling",
      status: "experimental",
    },
    {
      name: "DeviceAttributes",
      status: {
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "stable",
        "default": "experimental",
      },
    },
    {
      name: "DeviceOrientationRequestPermission",
      status: "experimental",
    },
    {
      name: "DevicePosture",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      // This feature makes the <dialog> element close properly when its "open"
      // attribute is removed. https://github.com/whatwg/html/issues/5802
      name: "DialogCloseWhenOpenRemoved",
      status: "experimental",
    },
    {
      name: "DialogNewFocusBehavior",
      status: "experimental",
      depends_on: ["NewGetFocusableAreaBehavior"],
    },
    {
      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"
      },
    },
    {
      // Shipping in M123.  Flag should be removed after M123 has been
      // shipping to stable for a few weeks.
      name: "DirAutoNoInheritance",
      status: "stable",
    },
    {
      name: "DirectSockets",
      public: true,
      status: "experimental",
    },
    {
      // Shipping in M121.  Flag should be removed after M121 has been
      // shipping to stable for a few weeks.
      name: "DirnameMoreInputTypes",
      status: "stable",
    },
    {
      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",
    },
    {
      // Bypasses the enforcement of the Page Embedded Permission Control
      // security checks. This flag is disabled by default and should only be
      // enabled in automated tests in order to allow them to avoid needing to
      // wait until the PEPC is validated and also to use JS-initiated clicks.
      name: "DisablePepcSecurityForTesting",
    },
    {
      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,
    },
    {
      // `kHidden` and `kHiddenButPainting` visibility states are treated as
      // hidden in the sense of `document.visibilityState`.  However, they are
      // handled differently internally.  For example, video playback should
      // continue in `kHiddenButPainting`, such as when the page is being
      // background captured.  When enabled, this feature causes blink to
      // notify internal observers about visibility changes between the two
      // hidden states, in addition to transitions to/from `kVisible`.
      //
      // Since the two hidden states are exposed to the web identically, there
      // is no `visibilitychanged` event fired when switching between them.
      //
      // When this feature is disabled, blink reverts to its original behavior
      // of eliding transitions between the two hidden states, including to
      // internal observers.  This behavior causes problems with capture and
      // picture-in-picture, but is preserved as a safe fallback.
      name: "DispatchHiddenVisibilityTransitions",
      status: "stable",
      base_feature: "DispatchHiddenVisibilityTransitions",
    },
    {
      // Allowing elements with display:contents to have focus.
      // See https://crbug.com/1366037
      name: "DisplayContentsFocusable",
      status: "experimental",
    },
    {
      name: "DisplayCutoutAPI",
      base_feature: "none",
      public: true,
    },
    {
      // Makes document's fallback base URL use about:blank instead of the base
      // URL of whatever execution context created it in order to match the
      // HTML spec and the behavior already shipped in all other browsers. This
      // behavior is reflected by document.baseURI.
      name: "DocumentBaseURIFix",
      status: "stable",
    },
    {
      name: "DocumentCookie",
    },
    {
      name: "DocumentDomain",
    },
    {
      name: "DocumentOpenOriginAliasRemoval",
      status: "experimental",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "DocumentOpenSandboxInheritanceRemoval",
      status: "stable",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "DocumentPictureInPictureAPI",
      status: {
        "Android": "",
        "default": "stable",
      },
    },
    // Enables the ability to use Document Policy header to control feature
    // DocumentDomain.
    {
      name: "DocumentPolicyDocumentDomain",
      status: "experimental",
    },
    // Enables the ability to use Document Policy header to control feature
    // IncludeJSCallStacksInCrashReports. https://chromestatus.com/feature/4731248572628992
    {
      name: "DocumentPolicyIncludeJSCallStacksInCrashReports",
      status: "experimental",
    },
    {
      name: "DocumentPolicyNegotiation",
      origin_trial_feature_name: "DocumentPolicyNegotiation",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    // Enables the ability to use Document Policy header to control feature
    // SyncXHR.
    {
      name: "DocumentPolicySyncXHR",
      status: "experimental",
    },
    {
      // https://chromestatus.com/feature/5113053598711808
      name: "DocumentRenderBlocking",
      status: "stable",
      implied_by: ["ViewTransitionOnNavigation"],
    },
    {
      name: "DocumentWrite",
    },
    // When enabled, this allows users of DOMParser to do:
    // (new DOMParser()).parseFromString(...,{includeShadowRoots:true}).
    // This is being deprecated and removed: crbug.com/329330085.
    // The fieldtrial_testing_config currently disables this feature for tests.
    {
      name: "DOMParserIncludeShadowRoots",
      status: "stable",
    },
    // Controls whether DOMParser.parseFromString() attempts to use the
    // html fast path parser. This flag is to be used as a killswitch in case
    // of any issues.
    {
      name: "DOMParserUsesHTMLFastPathParser",
      status: "stable"
    },
    {
      name: "DOMPartsAPI",
      status: "experimental",
    },
    {
      // Shipping in M121, so should be safe to remove in M126.
      name: "DontFireDblclickOnDisabledFormControls",
      status: "stable",
    },
    {
      name: "DynamicScrollCullRectExpansion",
      status: "experimental",
    },
    {
      name: "ElementCapture",
      origin_trial_feature_name: "ElementCapture",
      status: {"Android": "", "default": "experimental"},
    },
    {
      // This is the "new" version of getHTML() used for declarative shadow
      // DOM, and this version will replace the deprecated getInnerHTML(), which
      // is enabled by the ElementGetInnerHTML feature.
      name: "ElementGetHTML",
      status: "experimental",
    },
    {
      // This is the "old" version of getInnerHTML() used for declarative shadow
      // DOM, and this version is deprecated. The replacement is enabled by the
      // ElementGetHTML feature. Once the new feature is stabilized and shipped,
      // this feature (and its corresponding functionality) will be removed.
      name: "ElementGetInnerHTML",
      status: "stable",
    },
    {
      name: "EmptyClipboardRead",
      status: "stable",
    },
    {
      name: "EnforceAnonymityExposure",
      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",
    },
    {
      name: "ExperimentalContentSecurityPolicyFeatures",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExperimentalJSProfilerMarkers",
      status: "experimental",
    },
    {
      name: "ExperimentalPolicies",
      status: "experimental",
    },
    {
      name: "ExposeRenderTimeNonTaoDelayedImage",
    },
    {
      name: "ExtendedTextMetrics",
      status: "experimental",
    },
    {
      name: "ExtraWebGLVideoTextureMetadata",
    },
    {
      name: "EyeDropperAPI",
      status: {
        // EyeDropper UI is available on ChromeOS, Linux (x11), Mac, and Win.
        // This list should match the supported operating systems for the
        // kEyeDropper base::Feature.
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "stable",
        "Linux": "stable",
        "Mac": "stable",
        "Win": "stable",
      },
      // When running under experimental platform variants, such as
      // Linux/Wayland, EyeDropper base::Feature defined in the browser
      // process is used to disable it at runtime, if needed.
      base_feature: "none",
      public: true,
    },
    {
      name: "FaceDetector",
      status: "experimental",
    },
    {
      name: "FakeNoAllocDirectCallForTesting",
      status: "test",
    },
    {
      name: "FastPositionIterator",
      // Not enabled due to a RTL issue. crbug.com/1421016.
    },
    {
      name: "FedCm",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmAuthz",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmAutoSelectedFlag",
      depends_on: ["FedCm"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmButtonMode",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
      origin_trial_feature_name: "FedCmButtonMode",
      origin_trial_allows_third_party: true,
    },
    {
      name: "FedCmDisconnect",
      depends_on: ["FedCm"],
      base_feature: "none",
      status: "stable",
      public: true,
    },
    {
      name: "FedCmDomainHint",
      depends_on: ["FedCm"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmError",
      depends_on: ["FedCm"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmIdPRegistration",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmIdpSigninStatus",
      depends_on: ["FedCm"],
      public: true,
      status: "stable",
      base_feature: "none",
      browser_process_read_access: true,
    },
    {
      name: "FedCmMultipleIdentityProviders",
      depends_on: ["FedCm"],
      base_feature: "none",
      public: true,
    },
    {
      name: "FedCmSelectiveDisclosure",
      depends_on: ["FedCm"],
      public: true,
      base_feature: "none",
    },
    {
      name: "FencedFrames",
      base_feature: "none",
      // This helps enable and expose the <fencedframe> element, but note that
      // blink::features::kFencedFrames must be enabled as well, 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,
    },
    {
      // Allows fenced frames to access unpartioned data via Shared Storage in
      // exchange for disabling untrusted network access. This is the Blink
      // counterpart of the base::Feature with the same name. Because local
      // unpartitioned data access requires browser and renderer process
      // coordination, the value of this flag is strictly controlled by the
      // base::Feature variant, and setting this flag does nothing.
      name: "FencedFramesLocalUnpartitionedDataAccess",
      base_feature: "none",
      public: true,
    },
    {
      // The Blink runtime-enabled feature name for the API's IDL.
      name: "FetchLaterAPI",
      status: "experimental",
      origin_trial_feature_name: "FetchLaterAPI",
      origin_trial_allows_third_party: true,
      base_feature: "FetchLaterAPI",
      // base_feature is meant as kill-switch. This runtime-enabled feature
      // should follow the Origin Trial unless explicitly overriden by Finch or
      // commandline flags.
      base_feature_status: "enabled",
      // Enables the Blink feature only when the base::Feature is overridden by
      // field trial or command line.
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "FetchUploadStreaming",
      status: "stable",
    },
    {
      // Also enabled when blink::features::kFileHandlingAPI is overridden
      // on the command line (or via chrome://flags).
      name: "FileHandling",
      depends_on: ["FileSystemAccessLocal"],
      status: {"Android": "test", "default": "stable"},
      base_feature: "FileHandlingAPI",
    },
    {
      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"],
    },
    {
      // In-development features for the File System Access API.
      name: "FileSystemAccessAPIExperimental",
      status: "experimental",
    },
    {
      // The FileSystemHandle.getCloudIdentifiers() method (see
      // crbug.com/1443354).
      name: "FileSystemAccessGetCloudIdentifiers",
      status: {
        "ChromeOS_Ash": "experimental",
        "ChromeOS_Lacros": "experimental",
        "default": "",
      }
    },
    {
      // Non-OPFS File System Access API.
      name: "FileSystemAccessLocal",
      status: {"Android": "test", "default": "stable"},
    },
    {
      name: "FileSystemAccessLockingScheme",
      status: "stable",
    },
    {
      // OPFS File System Access API.
      name: "FileSystemAccessOriginPrivate",
      status: "stable",
    },
    {
      // The FileSystemObserver interface for the File System Access API.
      // See https://crbug.com/1019297.
      name: "FileSystemObserver",
      depends_on: ["FileSystemAccess"],
      status: "experimental",
    },
    {
      name: "Fledge",
      base_feature: "none",
      origin_trial_feature_name: "PrivacySandboxAdsAPIs",
      origin_trial_allows_third_party: true,
      public: true,
    },
    {
      name: "FledgeBiddingAndAuctionServerAPI",
      origin_trial_feature_name: "FledgeBiddingAndAuctionServer",
      origin_trial_allows_third_party: true,
    },
    {
      name: "FledgeClearOriginJoinedAdInterestGroups",
      status: "stable",
    },
    {
      name: "FledgeCreateAuctionNonceSynchronousResolution",
      status: "stable",
    },
    {
      name: "FledgeCustomMaxAuctionAdComponents",
    },
    {
      // Enables using a 'deprecatedRenderURLReplacements' field within the
      // Protected Audience ad auction config.
      name: "FledgeDeprecatedRenderURLReplacements"
    },
    {
      name: "FledgeDirectFromSellerSignalsHeaderAdSlot",
      status: "stable",
    },
    {
      name: "FledgeFeatureDetection",
      // FledgeFeatureDetection should be on if any of the features it aims
      // to help detect is on.
      implied_by: ["FledgeCustomMaxAuctionAdComponents",
                   "FledgeDeprecatedRenderURLReplacements"],
      base_feature: "none",
    },
    {
      name: "FledgeMultiBid",
    },
    {
      name: "FledgeNegativeTargeting",
      status: "stable",
    },
    {
      // Enables using a 'reportingTimeout' field within the Protected Audience
      // ad auction config.
      name: "FledgeReportingTimeout",
    },
    {
      name: "FledgeTrustedBiddingSignalsSlotSize",
      status: "stable",
    },
    {
      name: "FluentOverlayScrollbars",
    },
    {
      name: "FluentScrollbars",
    },
    {
      // Kill switch for crbug.com/1420810 fix
      // TODO(xiaochengh): Remove after M122.
      name: "FlushParserBeforeCreatingCustomElements",
      status: "stable",
    },
    {
      name: "Focusgroup",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "Focusgroup",
    },
    {
      name: "FocusStyleInvalidationOnPageActivation",
      status: "stable",
    },
    {
      name: "FontAccess",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "FontationsFontBackend",
    },
    {
      name: "FontFamilyPostscriptMatchingCTMigration",
    },
    {
      name: "FontFamilyStyleMatchingCTMigration",
    },
    {
      name: "FontMatchingCTMigration",
      status: "stable",
    },
    {
      name: "FontPaletteAnimation",
      status: "stable",
    },
    {
      name: "FontSrcLocalMatching",
      base_feature: "none",
      // No status, as the web platform runtime enabled feature is controlled by
      // a Chromium level feature.
    },
    {
      // 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",
    },
    {
      // This is used in tests to perform memory measurement without
      // waiting for GC.
      name:"ForceEagerMeasureMemory",
    },
    {
      // https://github.com/flackr/reduce-motion/blob/main/explainer.md
      name: "ForceReduceMotion",
    },
    {
      name: "ForceTallerSelectPopup",
      status: {"ChromeOS_Ash": "stable", "ChromeOS_Lacros": "stable"},
    },
    {
      name: "FormattedText",
      status: "experimental",
    },
    {
      // 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",
    },
    {
      // TODO(crbug.com/1432009) Allow form controls with vertical writing mode
      // to have direction affect the flow of the control.
      name: "FormControlsVerticalWritingModeDirectionSupport",
      status: "stable",
    },
    {
      // Allow these form controls to have vertical writing mode: select, meter,
      // progress, button and non-text-based input types.
      name: "FormControlsVerticalWritingModeSupport",
      status: "stable",
    },
    {
      // Allow text-based form controls to have vertical writing mode: textarea
      // and input types email, number, password, search, tel, text, url.
      name: "FormControlsVerticalWritingModeTextSupport",
      status: "stable",
    },
    {
      // Bug fix for crbug.com/1429585
      name: "FormStateRestoreCallbackCallWithState",
      status: "stable",
    },
    {
      name: "FractionalScrollOffsets",
      base_feature: "none",
      public: true,
    },
    {
      name: "FreezeFramesOnVisibility",
      status: "experimental",
    },
    {
      // Enables `fullscreen` windowFeatures parameter in window.open().
      name: "FullscreenPopupWindows",
      status: "experimental",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
      origin_trial_feature_name: "FullscreenPopupWindows",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
    },
    {
      name: "GamepadButtonAxisEvents",
      status: "experimental",
    },
    {
      name: "GamepadMultitouch",
      status: "experimental",
      public: true,
    },
    {
      name: "GetAllScreensMedia",
      depends_on: ["GetDisplayMedia"],
      origin_trial_feature_name: "GetAllScreensMedia",
      origin_trial_os: ["chromeos"],
      public: true,
      status: "test",
    },
    {
      name: "GetDisplayMedia",
      public: true,
      status: {
        "Android": "experimental",
        "default": "stable",
      },
      base_feature: "none",
    },
    {
      name: "GetDisplayMediaRequiresUserActivation",
      depends_on: ["GetDisplayMedia"],
      status: "experimental",
    },
    {
      name: "GetNextSiblingPositionWhenLastChild",
      status: "stable",
    },
    {
      name: "GroupEffect",
      status: "test",
    },
    {
      name: "HandwritingRecognition",
      status: {
        "ChromeOS_Ash": "stable",
        "ChromeOS_Lacros": "stable",
        "default": "experimental",
      },
    },
    {
      // Updates the hanging behavior of preserved whitespace at the end of a
      // line to not depend on text-align. This flag is to be used as a
      // killswitch in case of any issues.
      // https://github.com/w3c/csswg-drafts/issues/3440
      // crbug.com/1363901
      name: "HangingWhitespaceDoesNotDependOnAlignment",
      status: "stable",
    },
    {
      name: "HasUAVisualTransition",
      status: "stable",
    },
    {
      name: "HighlightInheritance",
      status: "experimental",
    },
    {
      name: "HighlightPointerEvents",
    },
    {
      name: "HitTestOpaqueness",
      status: "experimental",
    },
    {
      name: "HrefTranslate",
      depends_on: ["TranslateService"],
      origin_trial_feature_name: "HrefTranslate",
      status: "stable",
      base_feature: "none",
    },
    // Adds support for the experimental `interesttarget`
    // attributes, as specified in the open-ui "Interest Invokers" explainer.
    // https://open-ui.org/components/interest-invokers.explainer/
    {
      name: "HTMLInterestTargetAttribute",
      status: "experimental",
    },
    // Additional default invoke actions that aren't part of v1 of invokers.
    // When this flag is disabled only v1 actions (popover and dialog defaults) will work.
    {
      name: "HTMLInvokeActionsV2",
      status: "experimental",
    },
    // Adds support for the experimental `invoketarget` and `invokeaction`
    // attributes, as specified in the open-ui "Invokers" explainer.
    // https://open-ui.org/components/invokers.explainer/
    {
      name: "HTMLInvokeTargetAttribute",
      status: "experimental",
    },
    {
      // 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 flag to control the popovertargetaction=hover behavior,
      // and associated CSS properties.
      name: "HTMLPopoverActionHover",
      status: "experimental",
    },
    {
      // TODO(crbug.com/1416284): Enables popover=hint functionality.
      name: "HTMLPopoverHint",
      status: "experimental",
    },
    {
      name: "HTMLSearchElement",
      status: "stable",
    },
    {
      name: "HTMLSelectElementShowPicker",
      status: "stable",
    },
    {
      name: "HTMLSelectListElement",
      status: "experimental",
    },
    {
      // http://crbug.com/1478969
      // https://github.com/whatwg/html/pull/9538
      // https://chromestatus.com/feature/6560361081995264
      // Enabled by default in M123, should be safe to remove in M127
      name: "HTMLUnsafeMethods",
      status: "stable",
    },
    {
      name: "ImplicitRootScroller",
      public: true,
      settable_from_internals: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    // This change, although technically breaking, is expected to be fully web-compatible
    // due to how import attributes are currently used in the ecosystem. However, this is
    // a killswitch just in case. This can be removed once it ships to stable and no
    // regressions are reported.
    {
      name: "ImportAttributesDisallowUnknownKeys",
      status: "stable"
    },
    {
      // ImprovedXMLErrors tweaks the way that we emit XML parsing errors in
      // some cases in order to comply with upstream changes to libxml.
      // Shipping in M123, so should be safe to remove in M126.
      name: "ImprovedXMLErrors",
      status: "stable",
    },
    {
      name: "IncomingCallNotifications",
    },
    {
      name: "InertDisplayTransition",
      status: "stable",
    },
    {
      name: "InertElementNonEditable",
      status: "stable",
    },
    {
      name: "InertElementNonSearchable",
      status: "stable",
    },
    {
      // If a painting bug no longer reproduces with this feature enabled, then
      // the bug is caused by incorrect cull rects.
      name: "InfiniteCullRect",
    },
    {
      name: "InheritUserModifyWithoutContenteditable",
      status: "stable",
    },
    {
      // 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 and
      // iOS.
      status: {"Android": "test", "iOS": "test", "default": "stable"},
    },
    // Insert a blockquote before a outer block after creating the blockquote
    // when indenting a node whose outer block is a blockquote. See
    // https://crbug.com/327665597
    {
      name: "InsertBlockquoteBeforeOuterBlock",
      status: "stable",
    },
    {
      // crbug.com/1420675
      name: "InsertLineBreakIfPhrasingContent",
      status: {"Android": "test", "default": "stable"},
    },
    {
      name: "InstalledApp",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "InteroperablePrivateAttribution",
      status: "experimental",
    },
    {
      name: "InterruptComposedScrollbarDisappearance",
      status: "stable",
    },
    {
      // If enabled, IntersectionObserverScrollMargin will be parsed.
      name: "IntersectionObserverScrollMargin",
      status: "stable",
    },
    {
      name: "IntersectionOptimization",
      status: "experimental",
    },
    {
      name: "InvertedColors",
      status: "experimental",
    },
    {
      name: "InvisibleSVGAnimationThrottling",
      status: "stable",
    },
    {
      name: "JavaScriptCompileHintsMagicRuntime",
      status: "experimental",
      origin_trial_feature_name: "JavaScriptCompileHintsMagic",
    },
    {
      name: "KeyboardAccessibleTooltip",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "KeyboardFocusableScrollers",
      status: "experimental",
    },
    {
      // This feature makes HTMLLabelElement::DefaultEventHandler always call
      // HTMLElement::DefaultEventHandler instead of only doing so
      // conditionally. Shipping in M123 so should be safe to remove in M127.
      name: "LabelEventHandlerCallSuper",
      status: "stable",
    },
    {
      name: "LangAttributeAwareFormControlUI",
      settable_from_internals: true,
    },
    {
      name: "LayoutFlexNewRowAlgorithmV3",
      status: "test",
    },
    {
      name: "LayoutIgnoreMarginsForSticky",
    },
    {
      name: "LayoutNGShapeCache",
      status: "test",
      base_feature: "LayoutNGShapeCache",
    },
    {
      name: "LayoutSegmentationCache",
      status: "stable",
    },
    {
      name: "LazyInitializeMediaControls",
      base_feature: "none",
      public: true,
      // This is enabled by features::kLazyInitializeMediaControls.
    },
    {
      // If enabled, the lazy load image observer will use a scroll margin in
      // its init dictionary instead of a root margin.
      name: "LazyLoadScrollMargin",
      public: true,
      status: "stable",
    },
    {
      // If enabled, the lazy load iframe observer will use a scroll margin in
      // its init dictionary instead of a root margin.
      name: "LazyLoadScrollMarginIframe",
      public: true,
      status: "stable",
    },
    {
      name: "LCPAnimatedImagesWebExposed",
      status: "test",
    },
    {
      name: "LCPMouseoverHeuristics",
    },
    {
      name: "LCPMultipleUpdatesPerElement",
    },
    {
      name: "LegacyWindowsDWriteFontFallback",
      // Enabled by features::kLegacyWindowsDWriteFontFallback;
      base_feature: "none",
    },
    {
      name: "LockedMode",
      status: "test",
      // Enabled by features::kLockedMode.
      public: true,
    },
    {
      // Enables long aniamtion frames as a performance API (the
      // "long-animation-frame" timeline entry)
      name: "LongAnimationFrameTiming",
      status: "stable"
    },
    {
      // Use LongAnimationFrameMonitor to emit longtask entries
      name: "LongTaskFromLongAnimationFrame",
      status: "stable",
    },
    {
      name: "MacFontsDeprecateFontTraitsWorkaround",
      status: "stable",
    },
    {
      name: "MachineLearningCommon",
      implied_by: ["MachineLearningModelLoader", "MachineLearningNeuralNetwork"],
      status: "experimental",
    },
    {
      name: "MachineLearningModelLoader",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "MachineLearningNeuralNetwork",
      public: true,
      status: {
        "ChromeOS_Ash": "experimental",
        "ChromeOS_Lacros": "experimental",
        "Win": "experimental",
        "Mac": "experimental",
        "Linux": "experimental",
        "default": "test"
      },
      base_feature: "none",
    },
    {
      name: "ManagedConfiguration",
      status: "stable",
    },
    {
      // crbug.com/40417720
      name: "MaskingGraphemeClusters",
      status: "stable",
      depends_on: ["OffsetMappingUnitVariable"],
    },
    {
      name:"MeasureMemory",
      status:"stable",
    },
    {
      name: "MediaCapabilitiesDynamicRange",
      status: "stable",
    },
    {
      name: "MediaCapabilitiesEncodingInfo",
      status: "experimental",
    },
    {
      name: "MediaCapabilitiesSpatialAudio",
      status: "test",
    },
    {
      name: "MediaCapture",
      status: {"Android": "stable"},
    },
    {
      name: "MediaCaptureBackgroundBlur",
      origin_trial_feature_name: "MediaCaptureBackgroundBlur",
      status: "experimental",
      implied_by: ["MediaCaptureCameraControls"],
      base_feature: "none",
    },
    {
      name: "MediaCaptureCameraControls",
      status: "experimental",
    },
    {
      name: "MediaCaptureConfigurationChange",
      origin_trial_feature_name: "MediaCaptureBackgroundBlur",
      status: "experimental",
      implied_by: ["MediaCaptureBackgroundBlur"],
      base_feature: "none",
    },
    {
      name: "MediaCaptureVoiceIsolation",
      status: "experimental",
    },
    // 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",
    },
    // Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.
    {
      name: "MediaEngagementBypassAutoplayPolicies",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaLatencyHint",
      status: "test",
    },
    {
      name: "MediaQueryNavigationControls",
    },
    {
      // This uses media::VideoEncoder implementation in MediaRecorder API
      // instead of using MediaRecorder own video encoder implementation.
      name: "MediaRecorderUseMediaVideoEncoder",
    },
    {
      name: "MediaSession",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "MediaSessionChapterInformation",
      status: "test",
    },
    {
      name: "MediaSessionEnterPictureInPicture",
      public: true,
      status: "stable",
    },
    {
      name: "MediaSourceExperimental",
      status: "experimental",
    },
    {
      name: "MediaSourceExtensionsForWebCodecs",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "MediaSourceExtensionsForWebCodecs",
    },
    {
      name: "MediaSourceNewAbortAndDuration",
      status: "experimental",
    },
    {
      name: "MediaStreamTrackTransfer",
      status: "test",
      base_feature: "none",
    },
    {
      name: "MessagePortCloseEvent",
      status: "test",
    },
    // This is enabled by default on Windows only. The only part that's
    // "experimental" is the support on other platforms.
    {
      name: "MiddleClickAutoscroll",
      status: "test",
    },
    {
      name: "MobileLayoutTheme",
    },
    {
      name: "ModelExecutionAPI",
      status: "test",
      base_feature: "EnableModelExecutionAPI",
    },
    {
      name: "MojoJS",
      status: "test",
    },
    // MojoJSTest is used exclusively in testing environments, whereas MojoJS
    // may also be used elsewhere.
    {
      name: "MojoJSTest",
      status: "test",
      base_feature: "none",
    },
    // crbug.com/269917: Make mouse event targets agnostic to mousedown event
    // cancellation when the pointer is dragged out of an iframe.
    {
      name: "MouseDragFromIframeOnCancelledMouseDown",
      status: "stable",
    },
    // crbug.com/40078978: Allow mouse-drag text selection even when mousemove
    // event is cancelled.
    {
      name: "MouseDragOnCancelledMouseMove",
      status: "stable",
    },
    // crbug.com/1446498: This feature is being used for the deprecation of
    // Mutation Events.
    {
      name: "MutationEvents",
      status: "stable",
      origin_trial_feature_name: "MutationEvents",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
      public: true,
    },
    // crbug.com/1446498: This feature is just used as part of an "early trial"
    // of disabling Mutation Events in Canary/Dev/Beta. If this feature is
    // enabled *and* MutationEvents is disabled, then a special console error
    // message is used to give more information.
    {
      name: "MutationEventsSpecialTrialMessage",
    },
    {
      name: "NavigateEventCommitBehavior",
      status: "experimental",
    },
    {
      name: "NavigateEventSourceElement",
      status: "experimental",
    },
    {
      name: "NavigationActivation",
      status: "stable",
    },
    {
      name: "NavigationId",
      status: "experimental",
      origin_trial_feature_name: "SoftNavigationHeuristics",
    },
    {
      name: "NavigatorContentUtils",
      // Android does not yet support NavigatorContentUtils.
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "NestedTopLayerSupport",
      status: "experimental",
    },
    {
      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",
    },
    {
      // This is a killswitch for the behavior of Element::GetFocusableArea
      // on delegatesFocus shadow hosts. This flag can be removed in M127 if
      // things are stable.
      name: "NewGetFocusableAreaBehavior",
      status: "stable",
    },
    {
      name: "NextSiblingPositionUseNextCandidate",
      status: "stable",
    },
    {
      name: "NoIdleEncodingForWebTests",
      status: "test",
    },
    // Doesn't increase the end offset on getting the range for a new line
    // character. See https://crbug.com/326888905
    {
      name: "NoIncreasingEndOffsetOnSplittingTextNodes",
      status: "stable",
    },
    // Makes enter/leave Mouse and Pointer Events non-composed as per
    // corresponding specifications.
    {
      name: "NonComposedEnterLeaveEvents",
      public: true,
      status: "stable",
    },
    // Doesn't insert empty blockquotes on outdenting a blockquote. See
    // https://crbug.com/323960902
    {
      name: "NonEmptyBlockquotesOnOutdenting",
      status: "stable",
    },
    {
      // TODO(crbug.com/924486): This feature enables the deprecated values
      // inner-spin-button, push-button, searchfield-cancel-button,
      // slider-horizontal, square-button. Disable this feature to stop
      // parsing or allowing these values.
      // This feature is disabled in fieldtrial testing config because we are
      // testing the deprecation via Finch.
      // https://drafts.csswg.org/css-ui-4/#appearance-switching
      name: "NonStandardAppearanceValuesHighUsage",
    },
    {
      // TODO(crbug.com/1426629): This feature enables the deprecated value
      // slider-vertical. Disable this feature to stop parsing or allowing these
      // values.
      // https://drafts.csswg.org/css-ui-4/#appearance-switching
      name: "NonStandardAppearanceValueSliderVertical",
      status: "stable",
    },
    {
      // TODO(crbug.com/924486): This feature enables the deprecated values
      // media-slider, media-sliderthumb, media-volume-slider
      // media-volume-sliderthumb, sliderthumb-horizontal, sliderthumb-vertical.
      // Disable this feature to stop parsing or allowing these values.
      // https://drafts.csswg.org/css-ui-4/#appearance-switching
      name: "NonStandardAppearanceValuesLowUsage",
    },
    {
      name: "NoOffsetMappingForInconsistentText",
      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"},
    },
    // 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.
    // The functionality in this Origin Trial is now enabled by default in the
    // browser by network::features::kPrefetchNoVarySearchShippedByDefault
    // feature parameter of network::features::kPrefetchNoVarySearch.
    // This runtime enabled feature is ignored as long as the feature
    // parameter network::features::kPrefetchNoVarySearchShippedByDefault is
    // not disabled via Finch.
    // 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: "ObservableAPI",
      status: "experimental",
      public: true,
    },
    {
      name: "OffMainThreadCSSPaint",
      status: "stable",
    },
    {
      name: "OffscreenCanvasCommit",
      status: "experimental",
    },
    {
      // crbug.com/40532763
      name: "OffsetMappingUnitVariable",
      status: "stable",
    },
    {
      name: "OmitBlurEventOnElementRemoval",
      status: "test"
    },
    {
      name: "OnDeviceChange",
      // Android does not yet support SystemMonitor.
      status: {"Android": "", "default": "stable"},
    },
    // This flag is a killswitch. It was only exists as a way for us to turn
    // the feature off in the emergency that it breaks websites.
    // TODO(http://crbug.com/1473340): Delete internal web_tests which are
    // redundant with existing WPTs when we delete this flag.
    {
      name: "OptionElementAlwaysUseLabel",
      status: "stable",
    },
    {
      name: "OrientationEvent",
      status: {"Android": "stable"},
    },
    {
      name: "OriginIsolationHeader",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "OriginPolicy",
      status: "experimental",
    },

    // Define a sample API for testing integration with the Origin Trials
    // Framework. The sample API is used in both unit and web tests for the
    // Origin Trials Framework. Do not change this flag to stable, as it exists
    // solely to generate code used by the sample API implementation.
    {
      name: "OriginTrialsSampleAPI",
      base_feature: "none",
      origin_trial_feature_name: "Frobulate",
    },
    // 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: "OverscrollCustomization",
      status: "experimental",
    },
    // 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",
    },
    // Support for page margin boxes.
    // https://www.w3.org/TR/css-page-3/#margin-boxes
    {
      name: "PageMarginBoxes",
    },
    {
      name: "PagePopup",
      // Android does not have support for PagePopup
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "PageRevealEvent",
      status: "stable",
      implied_by: ["ViewTransitionOnNavigation"],
    },
    {
      name: "PageSwapEvent",
      status: "stable",
      implied_by: ["ViewTransitionOnNavigation"],
    },
    {
      name: "PaintUnderInvalidationChecking",
      settable_from_internals: true,
    },
    {
      // PARAKEET ad serving runtime flag/JS API.
      name: "Parakeet",
      origin_trial_feature_name: "Parakeet",
    },
    // This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.
    {
      name: "PasswordReveal",
    },
    {
      name: "PasswordStrongLabel",
      status: "experimental",
    },
    {
      name: "PastingBlocksSVGUseNonLocalHrefs",
      status: "stable",
    },
    {
      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"],
      status: "stable",
    },
    {
      name: "PaymentInstruments",
      depends_on: ["PaymentApp"],
    },
    {
      name: "PaymentMethodChangeEvent",
      depends_on: ["PaymentRequest"],
      status: "stable",
    },
    // PaymentRequest is enabled by default on Android
    {
      name: "PaymentRequest",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PaymentRequestAllowOneActivationlessShow",
      public: true,
      status: "stable",
    },
    {
      name: "PaymentRequestMerchantValidationEvent",
      status: "experimental",
    },
    {
      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,
    },
    {
      // Enables performance.mark('mark_feature_usage'): crbug.com/1517170
      name: "PerformanceMarkFeatureUsage",
      status: "experimental"
    },
    {
      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",
    },
    {
      // Tracking bug for the implementation: https://crbug.com/1462930
      name: "PermissionElement",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "Permissions",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PermissionsRequestRevoke",
      status: "experimental",
    },
    // 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: "PointerCaptureLostOnRemovalDuringCapture",
      status: "stable",
    },
    {
      name: "PointerEventDeviceId",
      status: "test",
    },
    {
      name: "PositionOutsideTabSpanCheckSiblingNode",
      status: "stable",
    },
    {
      name: "PreciseMemoryInfo",
      base_feature: "none",
      public: true,
    },
    // Adds a web setting to disable CSS ScrollbarColor, ScrollbarWidth, and
    // legacy ::-webkit-scrollbar* pseudo element styling.
    {
      name: "PreferDefaultScrollbarStyles",
    },
    // Prefer not using composited scrolling. Composited scrolling will still
    // be used if there are other reasons forcing compositing. For consistency,
    // any code calling Settings::GetPreferCompositingToLCDTextEnabled() should
    // ensure that this flag overrides the setting.
    {
      name: "PreferNonCompositedScrolling",
      settable_from_internals: true,
    },
    {
      name: "PrefersReducedData",
      status: "experimental",
    },
    // This feature is deprecated and we are evangelizing affected sites.
    // See https://crbug.com/346236 for current status.
    {
      name: "PrefixedVideoFullscreen",
      status: "stable",
    },
    {
      // 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",
    },
    {
      // Used to allow chrome://flags to turn off prerendering. (Without using
      // the user-facing preloading settings page to turn off other
      // preloading.) See https://crbug.com/1494471.
      //
      // It also has some feature params defined throughout the codebase.
      name: "Prerender2",
      status: "stable",
    },
    {
      name: "Presentation",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // When enabled, gives the option to pretty-print JSON documents to
      // cleanly format the JSON and make it readable.
      name:"PrettyPrintJSONDocument",
      status: "stable",
    },
    {
      // Privacy intervention to disable reading the system accent-color via
      // images.
      name: "PreventReadingSystemAccentColor",
      status: "stable",
    },
    // 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: "PrivateAggregationAuctionReportBuyerDebugModeConfig",
      status: "stable",
    },
    {
      name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_feature_name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PrivateNetworkAccessNullIpAddress",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PrivateNetworkAccessPermissionPrompt",
      origin_trial_feature_name: "PrivateNetworkAccessPermissionPrompt",
      origin_trial_os: ["win", "mac", "linux", "fuchsia", "chromeos"],
      status: "stable",
      public: true,
      base_feature: "none",
    },
    {
      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",
    },
    {
      name: "RasterInducingScroll",
    },
    {
      name: "ReadableStreamAsyncIterable",
      status: "stable",
    },
    // If enabled, the Accept-Language header will be reduced.
    {
      name: "ReduceAcceptLanguage",
      base_feature: "none",
      origin_trial_feature_name: "ReduceAcceptLanguage"
    },
    {
      name: "ReduceCookieIPCs",
      status: "stable",
    },
    {
      // 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"},
    },
    {
      name: "RemotePlayback",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "RemotePlaybackBackend",
      settable_from_internals: true,
      status: {
        "Android": "stable",
        "Win": "stable",
        "Mac": "stable",
        "Linux": "stable",
        "default": "experimental"},
    },
    {
      name: "RemoveDanglingMarkupInTarget",
      status: "stable",
    },
    {
      name: "RemoveDataUrlInSvgUse",
      status: "stable",
    },
    {
      name: "RemoveMobileViewportDoubleTap",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // See https://github.com/whatwg/html/issues/10034
      name: "RenderBlockingInlineModuleScript",
      status: "stable",
    },
    {
      name: "RenderBlockingStatus",
      status: "stable",
    },
    {
      // The renderpriority attribute feature.
      // https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md
      name: "RenderPriorityAttribute",
    },
    {
      // TODO(crbug.com/1500633): Remove this flag when the new CursorAnchorInfo
      // mojo pipe is launched.
      name: "ReportVisibleLineBounds",
      status: {
        "Android": "stable",
        "default": "",
      }
    },
    {
      name: "ResourceTimingContentType",
      status: "experimental",
    },
    {
      name: "ResourceTimingUseCORSForBodySizes",
      status: "test",
    },
    {
      name: "RestrictGamepadAccess",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      // New behavior when line breaker rewinds floats. crbug.com/1499290
      name: "RewindFloats",
      status: "stable",
    },
    {
      name: "RtcAudioJitterBufferMaxPackets",
      origin_trial_feature_name: "RtcAudioJitterBufferMaxPackets",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RTCEncodedAudioFrameAbsCaptureTime",
      status: "experimental",
    },
    {
      name: "RTCEncodedFrameSetMetadata",
      status: "experimental",
      origin_trial_feature_name: "RTCEncodedFrameSetMetadata",
    },
    {
      name: "RTCEncodedVideoFrameAdditionalMetadata",
      status: "experimental",
    },
    // Enables the use of jitterBufferTarget attribute in WebRTC.
    // Spec: https://w3c.github.io/webrtc-extensions/#dom-rtcrtpreceiver-jitterbuffertarget
    {
      name: "RTCJitterBufferTarget",
      status: "stable",
    },
    // Legacy callback-based getStats() has limited availability unless this
    // Deprecation Trial is enabled.
    // TODO(https://crbug.com/822696): Remove when origin trial ends.
    {
      name: "RTCLegacyCallbackBasedGetStats",
      origin_trial_feature_name: "RTCLegacyCallbackBasedGetStats",
      status: "experimental",
      base_feature: "none",
    },
    // Enables the use of |RTCRtpEncodingParameters.codec|
    {
      name: "RTCRtpEncodingParametersCodec",
      status: "stable",
    },
    // Enables the use of |RTCRtpTransceiver::getHeaderExtensionsToNegotiate|,
    // |RTCRtpTransceiver::setHeaderExtensionsToNegotiate|, and
    // |RTCRtpTransceiver::getNegotiatedHeaderExtensions|.
    {
      name: "RTCRtpHeaderExtensionControl",
      status: "stable",
    },
    {
      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",
    },
    {
      // crbug.com/40942025
      name: "RtNoFirstLetterFirstLine",
      status: "stable",
    },
    {
      // crbug.com/324111880
      name: "RubyLineBreakable",
    },
    {
      // Runs a microtask checkpoint before creating custom elements in
      // XMLDocumentParser. Should be safe to remove after M125
      name: "RunMicrotaskBeforeXmlCustomElement",
      status: "stable",
    },
    {
      name: "SanitizerAPI",
      status: "experimental",
    },
    {
      name: "SchedulerYield",
      origin_trial_feature_name: "SchedulerYield",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      // https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries
      name: "ScopedCustomElementRegistry",
      status: "experimental",
    },
    // 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: "ScrollbarColor",
      status: "stable",
    },
    {
      name: "ScrollbarWidth",
      status: "stable",
    },
    {
      name: "ScrollEndEvents",
      status: "stable",
    },
    {
      name: "ScrollTimeline",
      status: "stable",
      implied_by: ["AnimationWorklet", "ScrollTimelineCurrentTime"]
    },
    {
      name: "ScrollTimelineAlwaysOnCompositor",
      status: "stable",
      depends_on: ["ScrollTimelineOnCompositor"],
    },
    {
      // Separate flag for crbug.com/1426506 (getCurrentTime API change) which
      // is expected to land after the initial launch of ScrollTimeline.
      name: "ScrollTimelineCurrentTime",
      status: "experimental"
    },
    {
      name: "ScrollTimelineOnCompositor",
      status: "stable"
    },
    // Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
    // as per the spec, matching other Web engines.
    //
    // This flag can't be removed until the Android min SDK version is 28
    // (i.e., 'P') or later.  See AWSettings.setScrollTopLeftInteropEnabled
    // and its caller.
    {
      name: "ScrollTopLeftInterop",
      status: "stable",
    },