runtime_enabled_features.json5

{
  // See third_party/blink/renderer/platform/RuntimeEnabledFeatures.md
  //
  // This list is used to generate runtime_enabled_features.h/cc which contains
  // a class that stores static enablers for all experimental features.

  parameters: {
    // Each feature can be assigned a "status". The "status" can be either
    // one of the values in the |valid_values| list or a dictionary of
    // the platforms listed in |valid_keys| to |valid_values|.
    // Use "default" as the key if you want to specify the status of
    // the platforms other than the ones declared in the dictionary.
    // ** Omitting "default" means the feature is not enabled on
    // the platforms not listed in the status dictionary
    //
    // Definition of each status:
    // * status=stable: Enable this in all Blink configurations. We are
    //   committed to these APIs indefinitely.
    // * status=experimental: In-progress features, Web Developers might play
    //   with, but are not on by default in stable.
    // * status=test: Enabled in ContentShell for testing, otherwise off.
    // Features without a status are not enabled anywhere by default.
    //
    // Example of the dictionary value use:
    // {
    //   name: "ExampleFeature",
    //   status: {"Android": "stable", "ChromeOS": "experimental"},
    // }
    // "ExampleFeature" will be stable on Android, experimental on ChromeOS
    // and not enabled on any other platform
    //
    // "stable" features listed here should be rare, as anything which we've
    // shipped stable can have its runtime flag removed soon after.
    status: {
      valid_values: ["stable", "experimental", "test"],
      valid_keys: ["Android", "Win", "ChromeOS", "Mac", "Lacros"]
    },

    // "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;
    // * depends_on: ["feature1","feature2",...]
    //   The feature is 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 static method then allows
    // the feature implementation to check if the trial is enabled for the
    // current context.
    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",
    },

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

  data: [
    {
      name: "Accelerated2dCanvas",
      settable_from_internals: true,
      status: "stable",
    },
    {
      name: "AcceleratedSmallCanvases",
      status: "stable",
    },
    {
      name: "AccessibilityAriaTouchPassthrough",
      status: "experimental",
      origin_trial_feature_name: "AccessibilityAriaTouchPassthrough",
    },
    {
      name: "AccessibilityAriaVirtualContent",
      status: "experimental",
    },
    {
      name: "AccessibilityExposeDisplayNone",
      status: "test",
    },
    {
      name: "AccessibilityExposeHTMLElement",
    },
    {
      name: "AccessibilityExposeIgnoredNodes",
    },
    {
      name: "AccessibilityObjectModel",
      status: "experimental",
    },
    {
      name: "AccessibilityPageZoom",
    },
    {
      name: "AccessibilityUseAXPositionForDocumentMarkers",
    },
    {
      name: "AddEventListenerAbortSignal",
      status: "stable",
    },
    {
      name: "AddressSpace",
      status: "experimental",
      implied_by: ["CorsRFC1918"],
    },
    {
      name: "AdInterestGroupAPI",
      origin_trial_feature_name: "AdInterestGroupAPI",
      implied_by: ["Fledge", "Parakeet"],
    },
    {
      name: "AdInterestGroupAPIRestrictedPolicyByDefault",
    },
    {
      name: "AdTagging",
      status: "test",
    },
    {
      // Deprecated, see UserActivationPostMessageTransfer.
      name: "AllowActivationDelegationAttr",
    },
    {
      name: "AllowContentInitiatedDataUrlNavigations",
    },
    {
      name: "AllowSyncXHRInPageDismissal",
      origin_trial_feature_name: "AllowSyncXHRInPageDismissal",
    },
    {
      name: "AndroidDownloadableFontsMatching",
    },
    {
      name: "AnimationWorklet",
      status: "experimental",
    },
    {
      name: "AnonymousIframe",
      status: "test",
    },
    {
      name: "AOMAriaProperties",
      status: "stable",
    },
    {
      name: "AOMAriaRelationshipProperties",
      status: "experimental",
    },
    {
      // Force disabled if blink::features::kAppCache is disabled, and this
      // will override any origin trial setting.
      // Disabled if blink::features::kAppCacheRequireOriginTrial is enabled,
      // but can be turned back on by the origin trial.
      // Otherwise, on by default.
      name: "AppCache",
      status: "stable",
      origin_trial_feature_name: "AppCache",
    },
    {
      name: "AppHistory",
      origin_trial_feature_name: "AppHistory",
      status: "experimental",
    },
    {
      name: "AriaTouchPassthrough",
      status: "experimental",
    },
    {
      name: "AudioOutputDevices",
      // Android does not yet support switching of audio output devices
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "AudioVideoTracks",
      status: "experimental",
    },
    {
      name: "AutoDarkMode",
      origin_trial_feature_name: "AutoDarkMode",
    },
    {
      name: "AutoExpandDetailsElement",
      status: "stable",
    },
    {
      name: "AutofillShadowDOM",
      status: "experimental",
    },
    {
      name: "AutoLazyLoadOnReloads",
      depends_on: ["LazyFrameLoading"],
    },
    {
      name: "AutomaticLazyFrameLoading",
      depends_on: ["LazyFrameLoading"],
      status: "stable",
    },
    {
      name: "AutomaticLazyImageLoading",
      depends_on: ["LazyImageLoading"],
      status: "stable",
    },
    {
      name: "AutomationControlled",
      settable_from_internals: true,
    },
    {
      name: "AutoPictureInPicture",
      depends_on: ["PictureInPictureAPI"],
      origin_trial_feature_name: "AutoPictureInPicture",
      status: "experimental",
    },
    {
      // Flag set by the media::kAutoplayIgnoreWebAudio feature flag.
      name: "AutoplayIgnoresWebAudio",
      settable_from_internals: true,
    },
    // When enabled, enforces new interoperable semantics for 3D transforms.
    // See crbug.com/1008483.
    {
      name: "BackfaceVisibilityInterop",
    },
    {
      name: "BackForwardCache",
    },
    {
      name: "BackForwardCacheExperimentHTTPHeader",
      origin_trial_feature_name: "BackForwardCacheExperimentHTTPHeader",
      status: "experimental",
    },
    {
      name: "BackgroundFetch",
      status: "stable",
    },
    {
      name: "BackgroundVideoTrackOptimization",
      status: "stable",
    },
    {
      name: "Badging",
      status: "stable",
    },
    {
      name: "BarcodeDetector",
      status: {
        // Built-in barcode detection APIs are only available from some
        // platforms. See //services/shape_detection.
        "Android": "stable",
        "ChromeOS": "stable",
        "Mac": "stable",
        "default": "test",
      },
    },
    {
      // https://github.com/chrishtr/battery-savings/blob/master/explainer.md
      name: "BatterySavingsMeta",
      origin_trial_feature_name: "BatterySavingsMeta",
      status: "experimental",
    },
    {
      // https://github.com/WICG/display-locking/blob/master/explainer-beforematch.md
      name: "BeforeMatchEvent",
      origin_trial_feature_name: "BeforeMatchEvent",
      status: "experimental",
    },
    {
      name: "BidiCaretAffinity",
    },
    {
      name: "BlinkRuntimeCallStats",
    },
    {
      name: "BlockCredentialedSubresources",
      status: "stable",
    },
    {
      name: "BlockingFocusWithoutUserActivation",
      status: "experimental",
    },
    {
      name: "BrowserVerifiedUserActivationKeyboard",
    },
    {
      name: "BrowserVerifiedUserActivationMouse",
    },
    {
      name: "CacheInlineScriptCode"
    },
    {
      name: "CacheStorageCodeCacheHint",
      origin_trial_feature_name: "CacheStorageCodeCacheHint",
      status: "experimental",
    },
    {
      name: "Canvas2dImageChromium",
    },
    {
      name: "Canvas2dLayers",
    },
    {
      name: "Canvas2dScrollPathIntoView",
      status: "experimental",
    },
    {
      name: "CanvasColorManagement",
      status: "stable",
    },
    {
      name: "CanvasColorManagementV2",
      status: "experimental",
    },
    {
      name: "CanvasContextLostInBackground",
    },
    {
      name: "CanvasFormattedText",
      status: "experimental",
    },
    {
      name: "CanvasImageSmoothing",
      status: "experimental",
    },
    {
      name: "CapabilityDelegation",
      implied_by: ["CapabilityDelegationPaymentRequest"],
      origin_trial_feature_name: "CapabilityDelegationPaymentRequest",
    },
    {
      name: "CapabilityDelegationPaymentRequest",
      origin_trial_feature_name: "CapabilityDelegationPaymentRequest",
    },
    {
      name: "CaptureHandle",
      origin_trial_feature_name: "CaptureHandle",
      depends_on: ["GetDisplayMedia"],
      status: {"Android": "", "default": "experimental"},
    },
    {
      name: "CaptureTimeInCsrc",
      status: "stable",
    },
    {
      name: "ClickPointerEvent",
      status: "stable",
    },
    {
      name: "ClickRetargetting",
      status: "experimental",
    },
    {
      name: "ClipboardCustomFormats",
      status: "experimental",
    },
    {
      name: "ClipboardSvg",
      status: "experimental",
    },
    {
      name: "CloseWatcher",
      status: "experimental",
    },
    {
      name: "CLSScrollAnchoring",
      status: "experimental",
    },
    {
      name: "COLRV1Fonts",
      status: "experimental",
    },
    {
      name: "CompositeBGColorAnimation",
      status: "experimental",
    },
    {
      name: "CompositeBoxShadowAnimation",
    },
    {
      name: "CompositeClipPathAnimation",
    },
    {
      name: "CompositedSelectionUpdate",
      status: {"Android": "stable"},
    },
    {
      name: "CompositeRelativeKeyframes",
      status: "stable"
    },
    {
      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",
      status: "experimental",
    },
    {
      name: "ConditionalFocus",
      origin_trial_feature_name: "ConditionalFocus",
      status: {"Android": "", "default": "experimental"},
      implied_by: ["RegionCapture"],
    },
    {
      name: "ConsolidatedMovementXY",
    },
    {
      name: "ContactsManager",
      status:  {"Android": "stable", "default": "test"},
    },
    {
      name: "ContactsManagerExtraProperties",
      status:  {"Android": "stable", "default": "test"},
    },
    {
      name: "ContainIntrinsicSizeAuto",
      status: "test",
    },
    {
      name: "ContentIndex",
      status:  {"Android": "stable", "default": "experimental"},
    },
    {
      name: "ContextMenu",
      status: "experimental",
    },
    {
      name: "ConversionMeasurement",
      origin_trial_feature_name: "ConversionMeasurement",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "ConversionMeasurementEventSources",
      status: "test",
    },
    {
      name: "CooperativeScheduling"
    },
    {
      name: "CorsRFC1918",
    },
    // This block isn't really used on its own. Blink doesn't really have to
    // know about COEP:credentialless. However it is used for "declaring" the
    // OriginTrial feature name. This is similar to:
    // https://chromium-review.googlesource.com/c/chromium/src/+/2366778
    // for CrossOriginOpenerPolicyReporting.
    {
      name: "CrossOriginEmbedderPolicyCredentialless",
      origin_trial_feature_name: "CrossOriginEmbedderPolicyCredentiallessOriginTrial",
      status: "experimental",
    },
    {
      name: "CrossOriginIsolation",
      status: "stable",
    },
    {
      name: "CrossOriginOpenerPolicyReporting",
      origin_trial_feature_name: "CrossOriginOpenerPolicyReporting",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "CrossOriginWebAssemblyModuleSharingAllowed",
    },
    {
      name: "CSS3Text",
      status: "experimental",
    },
    {
      name: "CSSAccentColor",
      status: "stable",
    },
    {
      // Whether <image> values are allowed as counter style <symbol>
      name: "CSSAtRuleCounterStyleImageSymbols",
    },
    {
      // https://github.com/w3c/csswg-drafts/issues/5693
      // Experimental support of @counter-style rules in shadow DOM.
      name: "CSSAtRuleCounterStyleInShadowDOM",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as
      name: "CSSAtRuleCounterStyleSpeakAsDescriptor",
      status: "test",
    },
    {
      // https://github.com/DevSDK/calc-infinity-and-NaN/blob/master/explainer.md
      name: "CSSCalcInfinityAndNaN",
      status: "test",
    },
    {
      // https://drafts.csswg.org/css-cascade-5/#layering
      name: "CSSCascadeLayers",
      status: "test",
    },
    {
      // Support case-sensitive attribute selector modifier
      // https://drafts.csswg.org/selectors-4/#attribute-case
      name: "CSSCaseSensitiveSelector",
      status: "test",
    },
    {
      // Support the 'only' keyword for the color-scheme property.
      name: "CSSColorSchemeOnly",
      origin_trial_feature_name: "AutoDarkMode",
      status: "test",
    },
    {
      name: "CSSColorTypedOM",
      status:  "experimental",
    },
    {
      // Stop propagation from BODY to HTML and viewport if HTML or BODY
      // elements have any containment applied.
      // https://drafts.csswg.org/css-contain-2/#contain-property
      name: "CSSContainedBodyPropagation",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-contain-3/#container-queries
      name: "CSSContainerQueries",
    },
    {
      // https://drafts.csswg.org/css-contain-3/#container-lengths
      name: "CSSContainerRelativeUnits",
      implied_by: ["CSSContainerQueries"]
    },
    {
      // With this flag disabled, we run UpdateStyle() over the full DOM tree
      // before running interleaved style/layout. With this flag enabled, we
      // skip style recalc in UpdateStyle() for containers which are guaranteed
      // to be reachable in the following layout.
      name: "CSSContainerSkipStyleRecalc",
      implied_by: ["CSSContainerQueries"]
    },
    {
      // Support for contain:inline-size and contain:block-size
      name: "CSSContainSize1D",
      implied_by: ["CSSContainerQueries"]
    },
    {
      // The content-visibility: hidden-matchable feature. This is a planned
      // follow-up to the main CSSContentVisibility feature, thus it is gated
      // by a different flag.
      // https://wicg.github.io/display-locking/
      name: "CSSContentVisibilityHiddenMatchable",
      origin_trial_feature_name: "BeforeMatchEvent",
      status: "experimental"
    },
    {
      // CSS animation/transition updates occur outside style recalc.
      //
      // https://crbug.com/1180159
      name: "CSSDelayedAnimationUpdates",
      status: "stable",
    },
    {
      name: "CSSDynamicRangeMediaQueries",
      status: "experimental"
    },
    {
      // Include custom properties in CSSComputedStyleDeclaration::item/length.
      // https://crbug.com/949807
      name: "CSSEnumeratedCustomProperties",
      status: "test",
    },
    {
      name: "CSSFocusVisible",
      status: "stable",
    },
    {
      name: "CSSFoldables",
      status: "experimental",
    },
    {
      // @font-face Font property descriptors auto range.
      // https://www.w3.org/TR/css-fonts-4/#font-prop-desc
      name: "CSSFontFaceAutoVariableRange",
      status: "test",
    },
    {
      // @font-face descriptor size-adjust.
      // https://drafts.csswg.org/css-fonts-5/#descdef-font-face-size-adjust
      name: "CSSFontFaceSizeAdjust",
      status: "stable",
    },
    {
      name: "CSSFontFamilyMath",
      status: "experimental",
      implied_by: ["MathMLCore"],
    },
    {
      name: "CSSFontSizeAdjust",
      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",
    },
    {
      name: "CSSIndependentTransformProperties",
      status: "experimental",
    },
    {
      name: "CSSLayoutAPI",
      status: "experimental",
    },
    {
      name: "CSSLogical",
      status: "experimental",
    },
    {
      name: "CSSLogicalOverflow",
      status: "test",
    },
    {
      name: "CSSMarkerNestedPseudoElement",
      status: "experimental",
    },
    {
      name: "CSSMathDepth",
      status: "experimental",
      implied_by: ["MathMLCore"],
    },
    {
      name: "CSSMathShift",
      status: "experimental",
      implied_by: ["MathMLCore"],
    },
    {
      name: "CSSMathStyle",
      status: "experimental",
      implied_by: ["MathMLCore"],
    },
    {
      name: "CSSMathVariant",
      status: "experimental",
      implied_by: ["MathMLCore"],
    },
    {
      name: "CSSModules",
      status: "stable",
    },
    {
      name: "CSSOffsetPathRay",
      status: "experimental",
    },
    {
      name: "CSSOffsetPathRayContain",
      status: "experimental",
    },
    {
      name: "CSSOffsetPositionAnchor",
      status: "experimental",
    },
    {
      name: "CSSPaintAPIArguments",
      status: "experimental",
    },
    {
      name: "CSSPictureInPicture",
      status: "experimental",
      depends_on: ["PictureInPictureAPI"],
    },
    {
      name: "CSSPositionStickyStaticScrollPosition",
      status: "experimental",
    },
    {
      // Match input elements which have been autofilled by user agent.
      // https://html.spec.whatwg.org/multipage/semantics-other.html#selector-autofill
      name: "CSSPseudoAutofill",
      status: "experimental",
    },
    {
      name: "CSSPseudoDir",
      status: "experimental",
    },
    {
      name: "CSSPseudoHas",
      status: "test",
    },
    {
      name: "CSSPseudoHasInSnapshotProfile",
      status: "experimental",
      implied_by: ["CSSPseudoHas"],
    },
    {
      // When an audio, video, or similar resource is "playing"
      // or "paused".
      // https://www.w3.org/TR/selectors-4/#video-state
      name: "CSSPseudoPlayingPaused",
      status: "test",
    },
    // Scrollbar styling.
    // https://drafts.csswg.org/css-scrollbars/
    {
      name: "CSSScrollbars",
      status: "test",
    },
    // Support for declarative parts of scroll-animations-1, i.e.
    // the animation-timeline property and the @scroll-timeline rule.
    //
    // https://drafts.csswg.org/scroll-animations-1/#animation-timeline
    // https://drafts.csswg.org/scroll-animations-1/#scroll-timeline-at-rule
    {
      name: "CSSScrollTimeline",
      status: "experimental",
    },
    {
      name: "CSSSnapSize",
      status: "experimental",
    },
    {
      // Support for CSS ::spelling-error, ::grammar-error, and the
      // spelling-error and grammar-error values in text-decoration-line.
      //
      // https://drafts.csswg.org/css-pseudo-4/#selectordef-spelling-error
      // https://drafts.csswg.org/css-pseudo-4/#selectordef-grammar-error
      // https://drafts.csswg.org/css-text-decor-4/#valdef-text-decoration-line-spelling-error
      // https://drafts.csswg.org/css-text-decor-4/#valdef-text-decoration-line-grammar-error
      name: "CSSSpellingGrammarErrors",
      status: "test",
    },
    // Make system color keywords compute to themselves.
    // https://github.com/w3c/csswg-drafts/issues/3847
    {
      name: "CSSSystemColorComputeToSelf",
      status: "experimental",
    },
    {
      // Support for ::target-text pseudo element as specified in
      // https://drafts.csswg.org/css-pseudo/#selectordef-target-text
      name: "CSSTargetTextPseudoElement",
      status: "stable",
    },
    // Support for registered custom properties with <image> syntax.
    {
      name: "CSSVariables2ImageValues",
      status: "test",
    },
    // Support for registered custom properties with <transform-list> and
    // <transform-function> syntax.
    {
      name: "CSSVariables2TransformValues",
      status: "test",
    },
    {
      name: "CustomElementDefaultStyle",
      status: "experimental",
    },
    {
      name: "CustomStatePseudoClass",
      status: "stable",
    },
    {
      name: "Database",
      status: "stable",
    },
    {
      name: "DecodeJpeg420ImagesToYUV",
      status: "stable",
    },
    {
      name: "DecodeLossyWebPImagesToYUV",
      status: "stable",
    },
    {
      name: "DelegatedInkTrails",
      status: "stable",
    },
    {
      name: "DesktopCaptureDisableLocalEchoControl",
      status: "experimental",
    },
    {
      name: "DesktopPWAsSubApps",
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature which needs to
      // be enabled to make the whole feature work.
    },
    {
      name: "DeviceAttributes",
      origin_trial_feature_name: "DeviceAttributes",
      origin_trial_os: ["chromeos"],
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      name: "DevicePosture",
      status: "experimental",
    },
    {
      name: "DialogFocusNewSpecBehavior",
      status: "stable",
    },
    {
      name: "DigitalGoods",
      origin_trial_feature_name: "DigitalGoodsV2",
      origin_trial_os: ["android", "chromeos"],
      status: {
        "Android": "experimental",
        "ChromeOS": "experimental",
        // crbug.com/1143079: Web tests cannot differentiate ChromeOS and Linux,
        // so enable the API on all platforms for testing.
        "default": "test"
      },
    },
    {
      name: "DirectSockets",
      status: "test",
    },
    {
      name: "DisableDifferentOriginSubframeDialogSuppression",
      origin_trial_feature_name: "DisableDifferentOriginSubframeDialogSuppression",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
    },
    {
      name: "DisableHardwareNoiseSuppression",
      origin_trial_feature_name: "DisableHardwareNoiseSuppression",
      status: "experimental",
    },
    {
      // Disable composited layer squashing in pre-CompositeAfterPaint for
      // testing.
      name: "DisableLayerSquashing",
    },
    {
      // When on, the display-capture permissions-policy is enforced.
      // When off, enforcement of this permissions-policy is skipped.
      // This is driven from the browser process by the Enterprise policy
      // called "DisplayCapturePermissionsPolicyEnabled".
      // TODO(crbug.com/1233969): Remove this around m100.
      name: "DisplayCapturePermissionsPolicy",
    },
    {
      name: "DisplayCutoutAPI",
      settable_from_internals: true,
    },
    {
      name: "DocumentCookie",
    },
    {
      name: "DocumentDomain",
    },
    {
      name: "DocumentPolicy",
      status: "stable",
    },
    // Enables the ability to use Document Policy header to control feature
    // DocumentDomain.
    {
      name: "DocumentPolicyDocumentDomain",
      status: "experimental",
      depends_on: ["DocumentPolicy"],
    },
    {
      name: "DocumentPolicyNegotiation",
      origin_trial_feature_name: "DocumentPolicyNegotiation",
      status: "experimental",
      depends_on: ["DocumentPolicy"],
    },
    // Enables the ability to use Document Policy header to control feature
    // SyncXHR.
    {
      name: "DocumentPolicySyncXHR",
      status: "experimental",
      depends_on: ["DocumentPolicy"],
    },
    {
      // Document transitions, including shared element transitions.
      // See https://github.com/WICG/shared-element-transitions
      name: "DocumentTransition",
      origin_trial_feature_name: "DocumentTransition",
    },
    {
      name: "DocumentWrite",
    },
    {
      name: "EarlyHintsPreloadForNavigationOptIn",
      origin_trial_feature_name: "EarlyHintsPreloadForNavigation",
      status: "experimental",
    },
    {
      name: "EditContext",
      status: "experimental",
    },
    {
      // http://crbug.com/707656 content editable in LayoutNG.
      name: "EditingNG",
      status: "stable",
    },
    {
      name: "EncryptedMediaSessionClosedReason",
      status: "stable",
    },
    {
      name: "EnterKeyHintAttribute",
      status: "stable",
    },
    {
      name: "ExceptionMetaDataForDevTools",
      status: "stable",
    },
    {
      name: "ExecCommandInJavaScript",
      status: "test",
    },
    {
      name: "ExperimentalContentSecurityPolicyFeatures",
      status: "experimental",
    },
    // Enables navigator.scheduling.isFramePending, allowing long-running JS to
    // be able to yield itself when a display update is scheduled.
    {
      name: "ExperimentalIsFramePending",
      status: "experimental"
    },
    // Enables navigator.scheduling.isInputPending, allowing long-running JS to
    // be able to yield itself when user input is queued (crbug.com/910421).
    {
      name: "ExperimentalIsInputPending",
      origin_trial_feature_name: "ExperimentalIsInputPending",
      status: "stable"
    },
    // Enables a DOM-exposed interface to profile client JS.
    // https://github.com/WICG/js-self-profiling
    {
      name: "ExperimentalJSProfiler",
      origin_trial_feature_name: "ExperimentalJSProfiler",
      status: "stable"
    },
    {
      name: "ExperimentalPolicies",
      depends_on: ["DocumentPolicy"],
      status: "experimental"
    },
    {
      name: "ExtendedTextMetrics",
      status: "experimental",
    },
    {
      name: "ExtraWebGLVideoTextureMetadata",
    },
    {
      name: "EyeDropperAPI",
      status: {
        // EyeDropper UI is available only on desktop operating systems.
        "Android": "test",
        "default": "stable",
      },
    },
    {
      name: "FaceDetector",
      status: "experimental",
    },
    {
      name: "FakeNoAllocDirectCallForTesting",
      status: "test",
    },
    {
      name: "FeaturePolicyForClientHints",
      status: "stable",
    },
    {
      name: "FeaturePolicyReporting",
      status: "experimental"
    },
    {
      name: "FencedFrames",
      // 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.
      status: "experimental",
      origin_trial_feature_name: "FencedFrames",
    },
    {
      name: "FetchUploadStreaming",
      origin_trial_feature_name: "FetchUploadStreaming",
      origin_trial_allows_third_party: true,
      status: "experimental",
    },
    {
      // Also enabled when blink::features::kFileHandlingAPI is overridden
      // on the command line (or via chrome://flags).
      name: "FileHandling",
      depends_on: ["FileSystemAccess"],
      status: {"Android": "test", "default": "experimental"},
      origin_trial_feature_name: "FileHandling",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
    },
    {
      name: "FileHandlingIcons",
      depends_on: ["FileHandling"],
      status: {"Android": "test", "default": "experimental"},
    },
    {
      name: "FileSystem",
      status: "stable",
    },
    {
      name: "FileSystemAccess",
      status: {"Android": "test", "default": "stable"},
    },
    {
      name: "FileSystemAccessAccessHandle",
      origin_trial_feature_name: "FileSystemAccessAccessHandle",
      status: "experimental",
    },
    {
      // In-development features for the File System Access API.
      name: "FileSystemAccessAPIExperimental",
      status: "experimental",
    },
    {
      name: "Fledge",
      origin_trial_feature_name: "Fledge",
    },
    {
      name: "FocuslessSpatialNavigation",
      settable_from_internals: true,
    },
    {
      name: "FontAccess",
      origin_trial_feature_name: "FontAccess",
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature which needs to
      // be enabled to make the whole feature work.
    },
    {
      name: "FontAccessPersistent",
      // TODO(crbug.com/1000486): Add when the Origin Trial dependency bug is fixed.
      // depends_on: ["FontAccess"],
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature which needs to
      // be enabled to make the whole feature work.
    },
    {
      name: "FontSrcLocalMatching",
      // No status, as the web platform runtime enabled feature is controlled by
      // a Chromium level feature.
    },
    {
      name: "FontSynthesis",
      status: "stable",
    },
    // For simulating Android's overlay fullscreen video in web tests on Linux.
    {
      name: "ForcedColors",
      status: "stable",
    },
    {
      name: "ForcedColorsPreserveParentColor",
      depends_on: ["ForcedColors"],
    },
    {
      // This is used in tests to perform memory measurement without
      // waiting for GC.
      name:"ForceEagerMeasureMemory",
    },
    {
      name: "ForceOverlayFullscreenVideo",
    },
    {
      name: "ForceSynchronousHTMLParsing",
    },
    {
      name: "ForceTallerSelectPopup",
      status: {"ChromeOS": "stable"},
    },
    {
      name: "FractionalLineHeight",
      status: "stable",
    },
    {
      name: "FractionalScrollOffsets",
      status: "experimental",
    },
    {
      name: "FreezeFramesOnVisibility",
      status: "experimental",
    },
    {
      name: "GamepadButtonAxisEvents",
      status: "experimental",
    },
    {
      name: "GetDisplayMedia",
      status: {
        "Android": "experimental",
        "default": "stable",
        },
    },
    {
      name: "GravitySensor",
      status: "stable",
    },
    {
      name: "GroupEffect",
      status: "test",
    },
    {
      name: "HandwritingRecognition",
      status: "experimental",
      // Trial also requires kHandwritingRecognitionWebPlatformApiFinch enabled.
      origin_trial_feature_name: "HandwritingRecognition",
      origin_trial_os: ["chromeos"]
    },
    {
      name: "HighlightAPI",
      status: "experimental",
    },
    {
      name: "HighlightInheritance",
    },
    {
      name: "HrefTranslate",
      depends_on: ["TranslateService"],
      origin_trial_feature_name: "HrefTranslate",
      status: "stable",
    },
    {
      name: "HTMLInputElementShowPicker",
      status: "experimental",
    },
    {
      name: "HTMLPopupElement",
      status: "experimental",
      implied_by: ["HTMLSelectMenuElement"],
    },
    {
      name: "HTMLSelectMenuElement",
      status: "experimental",
    },
    {
      name: "IdleDetection",
      status: "stable",
    },
    {
      name: "ImplicitRootScroller",
      settable_from_internals: true,
      status: {"Android": "stable"},
    },
    {
      name: "InertAttribute",
      status: "experimental",
    },
    {
      name: "InputMultipleFieldsUI",
      // No plan to support complex UI for date/time INPUT types on Android.
      status: {"Android": "test", "default": "stable"},
    },
    {
      name: "InstalledApp",
      status: "stable",
    },
    {
      name: "InteractionId",
      status: "stable",
    },
    {
      name: "InterestCohortAPI",
      origin_trial_feature_name: "InterestCohortAPI",
      origin_trial_allows_third_party: true,
    },
    {
      name: "InterestCohortFeaturePolicy",
      status: "experimental",
    },
    {
      name: "IntersectionObserverDocumentScrollingElementRoot",
      status: "stable",
    },
    {
      name: "KeyboardAccessibleTooltip",
      status: "experimental",
    },
    {
      name: "KeyboardFocusableScrollers",
      status: "experimental",
    },
    {
      name: "LangAttributeAwareFormControlUI",
      settable_from_internals: true,
    },
    {
      name: "LateFormNewlineNormalization",
      status: "stable"
    },
    {
      // LayoutNG has been enabled in M76, but we still keep this flag for
      // testing. See web_tests/FlagExpectations/disable-layout-ng for more
      // details about running web tests with LayoutNG disabled. This flag also
      // provides a convenient way for testing legacy layout code path in blink
      // unit tests.
      name: "LayoutNG",
      implied_by: ["BidiCaretAffinity", "CSSContainerQueries"],
      status: "stable",
    },
    {
      name: "LayoutNGBlockFragmentation",
      implied_by: ["LayoutNGFlexFragmentation", "LayoutNGGridFragmentation", "LayoutNGPrinting"],
    },
    {
      name: "LayoutNGBlockInInline",
      depends_on: ["LayoutNG"],
    },
    {
      // Block fragmentation support in the flex layout algorithm.
      // https://drafts.csswg.org/css-flexbox-1/#pagination
      name: "LayoutNGFlexFragmentation",
      depends_on: ["LayoutNG"],
    },
    {
      // Traverse the fragment tree when painting and hit-testing, instead of
      // the layout object tree.
      name: "LayoutNGFragmentTraversal",
      implied_by: ["LayoutNGBlockFragmentation"],
      status: "stable",
    },
    {
      // Full support for PositionForPoint in NGPhysicalFragment. Without this
      // enabled, we'll typically fall back to legacy code for block children.
      name: "LayoutNGFullPositionForPoint",
      implied_by: ["LayoutNGBlockFragmentation", "LayoutNGFragmentTraversal"],
      status: "stable",
    },
    {
      name: "LayoutNGGrid",
      depends_on: ["LayoutNG"],
      status: "stable",
    },
    {
      name: "LayoutNGGridCaching",
      depends_on: ["LayoutNGGrid"],
      status: "stable"
    },
    {
      // Block fragmentation support in the grid layout algorithm.
      // https://drafts.csswg.org/css-grid-1/#pagination
      name: "LayoutNGGridFragmentation",
      depends_on: ["LayoutNG"],
    },
    {
      name: "LayoutNGPrinting",
    },
    {
      name: "LayoutNGSubgrid",
      depends_on: ["LayoutNGGrid"],
      status: "test"
    },
    {
      name: "LayoutNGTable",
      depends_on: ["LayoutNG"],
      status: "stable"
    },
    {
      name: "LayoutNGTextCombine",
      depends_on: ["LayoutNG"],
      status: "stable"
    },
    {
      name: "LayoutNGTextControl",
      depends_on: ["EditingNG"],
      status: "stable",
    },
    {
      name: "LazyFrameLoading",
      status: "stable",
    },
    {
      name: "LazyFrameVisibleLoadTimeMetrics",
    },
    {
      name: "LazyImageLoading",
      status: "stable",
    },
    {
      name: "LazyImageVisibleLoadTimeMetrics",
    },
    {
      name: "LazyInitializeMediaControls",
      // This is enabled by features::kLazyInitializeMediaControls.
    },
    {
      name: "LCPAnimatedImagesWebExposed",
      status: "test",
    },
    {
      name: "LegacyWindowsDWriteFontFallback",
      // Enabled by features::kLegacyWindowsDWriteFontFallback;
    },
    {
      name: "ManagedConfiguration",
      status: "stable",
    },
    {
      name: "MathMLCore",
      status:"experimental",
      depends_on: ["LayoutNG"],
    },
    {
      name:"MeasureMemory",
      status:"stable",
    },
    {
      name: "MediaCapabilitiesDynamicRange",
      status: "test",
    },
    {
      name: "MediaCapabilitiesEncodingInfo",
      status: "experimental",
    },
    {
      name: "MediaCapabilitiesEncryptedMedia",
      status: "stable",
    },
    {
      name: "MediaCapabilitiesSpatialAudio",
      status: "test",
    },
    {
      name: "MediaCapabilitiesWebRtc",
      status: "experimental",
    },
    {
      name: "MediaCapture",
      status: {"Android": "stable"},
    },
    {
      name: "MediaCaptureDepthVideoKind",
      status: "experimental",
    },
    // Set to reflect the MediaCastOverlayButton feature.
    {
      name: "MediaCastOverlayButton",
    },
    {
      name: "MediaControlsExpandGesture"
    },
    {
      name: "MediaControlsOverlayPlayButton",
      settable_from_internals: true,
      status: {"Android": "stable"},
    },
    {
      name: "MediaControlsUseCutOutByDefault",
      status: "stable",
    },
    {
      name: "MediaDocumentDownloadButton",
    },
    {
      name: "MediaElementVolumeGreaterThanOne",
    },
    // Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.
    {
      name: "MediaEngagementBypassAutoplayPolicies",
    },
    {
      name: "MediaLatencyHint",
      status: "test",
    },
    {
      // https://github.com/whatwg/html/pull/6569
      name: "MediaMetaThemeColor",
      status: "stable",
    },
    {
      name: "MediaPreservesPitch",
      status: "stable",
    },
    {
      name: "MediaQueryNavigationControls",
    },
    {
      name: "MediaSession",
      status: "stable",
    },
    {
      name: "MediaSessionPosition",
      status: "stable",
    },
    {
      name: "MediaSessionWebRTC",
    },
    {
      name: "MediaSourceExperimental",
      status: "experimental",
    },
    {
      name: "MediaSourceExtensionsForWebCodecs",
      status: "experimental",
      origin_trial_feature_name: "MediaSourceExtensionsForWebCodecs",
    },
    {
      name: "MediaSourceInWorkers",
      status: "experimental",
      origin_trial_feature_name: "MediaSourceInWorkers",
    },
    {
      name: "MediaSourceNewAbortAndDuration",
      status: "experimental",
    },
    {
      // This is used in cases of mixed specification of stable and
      // experimental MediaSource features, such as in the IDL for an interface
      // constructor where exposure of the constructor in Window vs other
      // contexts can vary in stable vs experimental.
      name: "MediaSourceStable",
      status: "stable",
    },
    {
      name: "MediaStreamInsertableStreams",
      status: "stable",
      origin_trial_feature_name: "WebCodecs"
    },
    // 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: "ModuleServiceWorker",
      status: "stable",
    },
    {
      name: "MojoJS",
      status: "test",
    },
    // MojoJSTest is used exclusively in testing environments, whereas MojoJS
    // may also be used elsewhere.
    {
      name: "MojoJSTest",
      status: "test",
    },
    {
      // When enabled, iframes are not capturing mouse events by default.
      name: "MouseSubframeNoImplicitCapture",
    },
    {
      // Named pages for pagination (the "page" CSS property).
      name: "NamedPages",
      status: "stable",
    },
    {
      name: "NavigatorContentUtils",
      // Android does not yet support NavigatorContentUtils.
      status: {"Android": "", "default": "stable"},
    },
    {
      // Allows the navigator.language and navigator.languages APIs in insecure
      // contexts, which https://github.com/WICG/lang-client-hint proposes that
      // we deprecate.
      name: "NavigatorLanguageInInsecureContext",
      settable_from_internals: true,
      status: "stable",
    },
    {
      // Controlled by blink::features::kNavigatorPluginsFixed.
      name: "NavigatorPluginsFixed",
    },
    {
      name: "NetInfoDownlinkMax",
      // Only Android, ChromeOS support NetInfo downlinkMax, type and ontypechange now
      status: {"Android": "stable", "ChromeOS": "stable", "default": "experimental"},
    },
    {
      name: "NeverSlowMode",
    },
    {
      name: "NewCanvas2DAPI",
      origin_trial_feature_name: "NewCanvas2DAPI",
      status: "experimental",
    },
    // Not a web exposed feature, enabled from the command line.
    {
      name: "NewRemotePlaybackPipeline",
    },
    {
      name: "NoIdleEncodingForWebTests",
      status: "test",
    },
    {
      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",
      status: {"Mac": "test", "default": "stable"},
    },
    {
      name: "Notifications",
      status: "stable",
    },
    {
      name: "NotificationTriggers",
      origin_trial_feature_name: "NotificationTriggers",
      status: "experimental",
    },
    {
      name: "OffMainThreadCSSPaint",
      status: "stable",
    },
    {
      name: "OffscreenCanvasCommit",
      status: "experimental",
    },
    {
      // TODO(crbug.com/920069): Remove OffsetParentNewSpecBehavior after the
      // feature is in stable with no issues.
      name: "OffsetParentNewSpecBehavior",
      status: "experimental"
    },
    {
      name: "OnDeviceChange",
      // Android does not yet support SystemMonitor.
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "OrientationEvent",
      status: {"Android": "stable"},
    },
    {
      name: "OriginIsolationHeader",
      status: "stable",
    },
    {
      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",
      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.
    // TODO(yashard): Add tests for this feature.
    {
      name: "OriginTrialsSampleAPIDependent",
      depends_on: ["OriginTrialsSampleAPI"],
    },
    // 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",
      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: "OriginTrialsSampleAPIImplied",
      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",
      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",
      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: "OriginTrialsSampleAPIThirdParty",
      origin_trial_feature_name: "FrobulateThirdParty",
      origin_trial_allows_third_party: true,
    },
    {
      name: "OverflowClip",
      status: "stable",
    },
    {
      name: "OverscrollCustomization",
      settable_from_internals: true,
      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",
      origin_trial_feature_name: "PageFreezeOptIn",
    },
    {
      name: "PageFreezeOptOut",
      origin_trial_feature_name: "PageFreezeOptOut",
    },
    {
      name: "PagePopup",
      // Android does not have support for PagePopup
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "PaintUnderInvalidationChecking",
      settable_from_internals: true,
    },
    {
      name: "Parakeet",
      origin_trial_feature_name: "Parakeet",
    },
    {
      // This flag enables the Manifest parser to handle URL Protocols.
      // Also enabled when blink::features::kWebAppEnableProtocolHandlers is
      // overridden on the command line (or via chrome://flags).
      name: "ParseUrlProtocolHandler",
      status: "experimental",
      origin_trial_feature_name: "ParseUrlProtocolHandler",
      origin_trial_os: ["win", "mac", "linux"],
    },
    {
      name: "PartitionedCookies",
      origin_trial_feature_name: "PartitionedCookies",
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature,
      // net::features::kPartitionedCookies, which needs to be enabled to make
      // the whole feature work.
    },
    {
      name: "PassPaintVisualRectToCompositor",
    },
    // This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.
    {
      name: "PasswordReveal",
    },
    {
      name: "PaymentApp",
      status: "experimental",
    },
    {
      name: "PaymentHandlerChangePaymentMethod",
      status: "stable",
    },
    {
      name: "PaymentHandlerHandlesShippingAndContact",
      status: "stable",
    },
    {
      name: "PaymentMethodChangeEvent",
      status: "stable",
    },
    // PaymentRequest is enabled by default on Android
    {
      name: "PaymentRequest",
      status: "experimental",
    },
    // TODO(crbug.com/1209835): this feature is getting deprecated.
    {
      name: "PaymentRequestBasicCard",
      status: "stable",
    },
    {
      name: "PaymentRequestMerchantValidationEvent",
      status: "experimental",
    },
    {
      name: "PaymentRetry",
      status: "stable",
    },
    {
      name: "PercentBasedScrolling",
      settable_from_internals: true,
    },
    {
      name: "PerformanceManagerInstrumentation",
    },
    {
      name: "PeriodicBackgroundSync",
      status: "stable",
    },
    {
      name: "PerMethodCanMakePaymentQuota",
      origin_trial_feature_name: "PerMethodCanMakePaymentQuota",
      status: "experimental",
    },
    {
      name: "PermissionDelegation",
      status: "test",
    },
    {
      name: "Permissions",
      status: "stable",
    },
    {
      name: "PermissionsPolicyHeader",
      status: "stable"
    },
    {
      name: "PermissionsRequestRevoke",
      status: "experimental",
    },
    {
      name: "PictureInPicture",
      settable_from_internals: true,
    },
    // Picture-in-Picture API is disabled by default on Android.
    {
      name: "PictureInPictureAPI",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "PictureInPictureV2",
      depends_on: ["PictureInPictureAPI"],
      settable_from_internals: true,
    },
    // This is a reverse OT used for a phased deprecation.
    // https://crbug.com/918374
    {
      name: "PNaCl",
      origin_trial_feature_name: "PNaCl",
    },
    {
      name: "PointerLockOptions",
      origin_trial_feature_name: "PointerLockOptions",
      status: "stable",
    },
    {
      name: "PointerRawUpdate",
      status: "stable",
    },
    {
      name: "Portals",
      // Portals must be enabled by blink::features::kPortals as we require the
      // support of the browser process to enable the feature. Enabling this
      // feature specifically within blink has no effect. An experimental/test
      // status can only be set here if the default of blink::features::kPortals
      // allows for it.

      // Note that the origin trial paramaters are kept for future OT usage.
      // There is no currently running OT and it is not possible for OT code to
      // enable portals without browser process support.
      origin_trial_feature_name: "Portals",
      origin_trial_os: ["android"],
    },
    {
      name: "PreciseMemoryInfo",
    },
    // 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: "PrefersColorSchemeClientHintHeader",
      status: "stable",
    },
    {
      name: "PrefersContrast",
      depends_on: ["ForcedColors"],
      status: "stable",
    },
    {
      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",
    },
    {
      name: "Prerender2",
      origin_trial_feature_name: "Prerender2",
      origin_trial_os: ["android"],
    },
    // This RTE feature is used to indicate the status of RTE feature Prerender2
    // and an embedder feature flag that enables the Prerender2. With this flag
    // on, the related functions document.prerendering,
    // document.onprerenderingchange, and activationStart will be exported.
    {
      name: "Prerender2RelatedFeatures",
      implied_by: [ "Prerender2"],
      // This is not going into origin trial, "origin_trial_feature_name" is
      // required for using the "implied_by" behaviour.
      origin_trial_feature_name: "Prerender2RelatedFeatures__DONOTUSE",
    },
    {
      name: "Presentation",
      status: "stable",
    },
    {
      name: "PriorityHints",
      origin_trial_feature_name: "PriorityHintsAPI",
      status: "experimental",
    },
    {
      name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_feature_name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      status: "experimental",
    },
    {
      name: "PushMessaging",
      status: "stable",
    },
    {
      name: "PushMessagingSubscriptionChange",
      status: "experimental",
    },
    {
      name: "QuotaChange",
      status: "experimental",
    },
    {
      name: "RegionCapture",
      origin_trial_feature_name: "RegionCapture",
      status: "experimental",
    },
    {
      name: "RemotePlayback",
      status: "stable",
    },
    {
      name: "RemotePlaybackBackend",
      settable_from_internals: true,
      // Tracking bug for the implementation: https://crbug.com/728609
      status: {"Android": "stable", "default": ""},
    },
    {
      name: "RemoveMobileViewportDoubleTap",
      status: "stable"
    },
    {
      // The renderpriority attribute feature.
      // https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md
      name: "RenderPriorityAttribute"
    },
    {
      // See https://crbug.com/1012063
      name: "RequestVideoFrameCallback",
      status: "stable",
    },
    {
      name: "RestrictAutomaticLazyFrameLoadingToDataSaver",
      depends_on: ["AutomaticLazyFrameLoading"],
      status: "stable",
    },
    {
      name: "RestrictAutomaticLazyImageLoadingToDataSaver",
      depends_on: ["AutomaticLazyImageLoading"],
      status: "stable",
    },
    {
      name: "RestrictGamepadAccess",
      status: "experimental",
    },
    {
      name: "RtcAudioJitterBufferMaxPackets",
      origin_trial_feature_name: "RtcAudioJitterBufferMaxPackets",
      status: "experimental",
    },
    {
      name: "RtcAudioJitterBufferRtxHandling",
      origin_trial_feature_name: "RtcAudioJitterBufferRtxHandling",
      status: "experimental",
    },
    // Reverse Origin Trial for Plan B. When enabled through the Origin Trial,
    // Plan B is available beyond the initial removal date of Plan B (M93).
    {
      name: "RTCExtendDeadlineForPlanBRemoval",
      origin_trial_feature_name: "RTCExtendDeadlineForPlanBRemoval",
      status: "test",
    },
    // Enables the use of the RTCIceTransport with extensions.
    {
      name: "RTCIceTransportExtension",
      origin_trial_feature_name: "RTCQuicTransport",
      status: "experimental",
    },
    // Enables the use of the Insertable Streams legacy API.
    // TODO(https://crbug.com/1119801): Remove when the origin trial ends.
    {
      name: "RTCInsertableStreams",
      origin_trial_feature_name: "RTCInsertableStreams",
      status: "experimental",
    },
    // Enables the use of the RTCQuicTransport object.
    {
      name: "RTCQuicTransport",
      origin_trial_feature_name: "RTCQuicTransport",
      status: "experimental",
    },
    // Enables the use of |RTCRtpTransceiver::setOfferedRtpHeaderExtensions|,
    // |RTCRtpTransceiver::headerExtensionsToOffer|, and
    // |RTCRtpTransceiver::headerExtensionsNegotiated|.
    {
      name: "RTCRtpHeaderExtensionControl",
      status: "experimental",
    },
    // Enables the use of |RTCRtpTransceiver::stop()|
    {
      name: "RTCRtpTransceiverStop",
      status: "stable",
    },
    {
      name: "RTCStatsRelativePacketArrivalDelay",
      origin_trial_feature_name: "RTCStatsRelativePacketArrivalDelay",
      status: "experimental",
    },
    // Enables the use of SVC scalability mode in WebRTC.
    // Spec: https://w3c.github.io/webrtc-svc/
    {
      name: "RTCSvcScalabilityMode",
      status: "experimental",
    },
    // Enables the use of |RTCConfiguration::sdpSemantics| to override the
    // default SDP semantics at RTCPeerConnection construction.
    {
      name: "RTCUnifiedPlan",
      status: "stable",
    },
    // Overrides the default SDP semantics to be Unified Plan at
    // RTCPeerConnection construction (unless otherwise specified).
    {
      name: "RTCUnifiedPlanByDefault",
    },
    {
      name: "SanitizerAPI",
      status: "experimental",
    },
    {
      name: "SchedulerCurrentTaskSignal",
      status: "experimental",
    },
    // WebSpeech API with both speech recognition and synthesis functionality
    // is not fully enabled on all platforms.
    {
      name: "ScriptedSpeechRecognition",
      status: "stable",
    },
    {
      name: "ScriptedSpeechSynthesis",
      status: "stable",
    },
    {
      name: "ScriptElementSupports",
      status: "stable",
    },
    {
      name: "ScrollbarGutter",
      status: "stable",
    },
    {
      name: "ScrollbarWidth",
      status: "test",
    },
    {
      name: "ScrollCustomization",
    },
    {
      name: "ScrollSnapAfterLayout",
      status: "stable",
    },
    {
      name: "ScrollTimeline",
      status: "experimental",
      implied_by: ["AnimationWorklet", "CSSScrollTimeline"]
    },
    // Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
    // as per the spec, matching other Web engines.
    {
      name: "ScrollTopLeftInterop",
      status: "stable",
    },
    {
      name: "ScrollUnification",
    },
    {
      name: "SecurePaymentConfirmation",
      status: "stable",
    },
    {
      name: "SecurePaymentConfirmationDebug",
    },
    {
      name: "SendBeaconThrowForBlobWithNonSimpleType",
      status: "stable",
    },
    {
      name: "SendMouseEventsDisabledFormControls",
      status: "experimental",
    },
    {
      name: "SensorExtraClasses",
      status: "experimental",
    },
    {
      name: "Serial",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "ServiceWorkerClientLifecycleState",
      status: "experimental",
    },
    {
      name: "ServiceWorkerFetchEventWorkerTiming",
      status: "experimental",
    },
    {
      name: "ServiceWorkerSubresourceFilter",
      origin_trial_feature_name: "ServiceWorkerSubresourceFilter",
      status: "experimental",
    },
    {
      name: "SharedArrayBuffer",
    },
    {
      name: "SharedArrayBufferOnDesktop",
    },
    {
      name: "SharedArrayBufferUnrestrictedAccessAllowed",
    },
    {
      name: "SharedAutofill",
      status: "experimental",
    },
    {
      name: "SharedStorageAPI",
      status: "test",
    },
    {
      name: "SharedWorker",
      // Android does not yet support SharedWorker. crbug.com/154571
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "SignatureBasedIntegrity",
      origin_trial_feature_name: "SignatureBasedIntegrity",
      status: "experimental",
    },
    {
      name: "SignedExchangeSubresourcePrefetch",
      origin_trial_feature_name: "SignedExchangeSubresourcePrefetch",
      status: "experimental",
    },
    {
      name: "SkipAd",
      depends_on: ["MediaSession"],
      origin_trial_feature_name: "SkipAd",
      status: "experimental",
    },
    {
      name: "SkipTouchEventFilter",
      settable_from_internals: true,
    },
    // An origin trial feature name is required for this, even though it's
    // actually enabled by the more specific trial. Having these as separate
    // features will allow Blink to distinguish for which thing the trial
    // was enabled.
    {
      name: "SpeculationRules",
      implied_by: ["SpeculationRulesPrefetchProxy", "Prerender2"],
      origin_trial_feature_name: "SpeculationRules__DONOTUSE",
    },
    // Origin trial to enable Speculation Rules for access to the prefetch proxy.
    // https://crbug.com/1190167
    {
      name: "SpeculationRulesPrefetchProxy",
      origin_trial_feature_name: "SpeculationRulesPrefetch",
    },
    {
      name: "SrcsetMaxDensity",
    },
    // Used as argument in attribute of stable-release functions/interfaces
    // where a runtime-enabled feature name is required for correct IDL syntax.
    // This is a global flag; do not change its status.
    {
      name: "StableBlinkFeatures",
      status: "stable",
    },
    {
      // Enabled when blink::features::kStorageAccessAPI is enabled.
      name: "StorageAccessAPI",
      status: "test",
    },
    {
      name: "StorageBuckets",
      status: "experimental",
    },
    {
      name: "StorageFoundationAPI",
      origin_trial_feature_name: "StorageFoundationAPI",
      status: "experimental",
    },
    {
      name: "StrictMimeTypesForWorkers",
      status: "experimental"
    },
    {
      name: "SubresourceWebBundles",
      origin_trial_feature_name: "SubresourceWebBundles",
      origin_trial_allows_third_party: true,
      status: "experimental"
    },
    {
      name: "SVGTextNG",
      depends_on: ["LayoutNG"],
      status: "stable"
    },
    {
      // Synchronously load web fonts inlined as data urls (crbug.com/1236283)
      name: "SyncLoadDataUrlFonts",
      status: "test",
    },
    {
      name: "SystemWakeLock",
      status: "experimental",
    },
    {
      // TODO(crbug.com/898942): Remove this in Chrome 95.
      name: "TargetBlankImpliesNoOpener",
      status: "stable",
    },
    // For unit tests.
    {
      name: "TestFeature",
    },
    // For unit tests.
    {
      name: "TestFeatureDependent",
      depends_on: ["TestFeatureImplied"],
    },
    // For unit tests.
    {
      name: "TestFeatureImplied",
      implied_by: ["TestFeature"],
    },
    {
      name: "TextDetector",
      status: "experimental",
    },
    {
      name: "TextFragmentAPI",
      status: "experimental",
    },
    {
      name: "TextFragmentIdentifiers",
      origin_trial_feature_name: "TextFragmentIdentifiers",
      status: "stable",
    },
    {
      name: "TextFragmentTapOpensContextMenu",
      status: {"Android": "stable"},
    },
    {
      name: "ThirdPartyOriginTrials",
      status: "stable",
    },
    {
      name: "ThrottleDisplayNoneAndVisibilityHiddenCrossOriginIframes",
      status: "experimental",
    },
    {
      name: "TimerThrottlingForBackgroundTabs",
      status: "stable",
    },
    {
      name: "TimeZoneChangeEvent",
      status: "experimental",
    },
    // Many websites disable mouse support when touch APIs are available.  We'd
    // like to enable this always but can't until more websites fix this bug.
    // Chromium sets this conditionally (eg. based on the presence of a
    // touchscreen) in ApplyWebPreferences. "Touch events" themselves are always
    // enabled since they're a feature always supported by Chrome.
    {
      name: "TouchEventFeatureDetection",
      origin_trial_feature_name: "ForceTouchEventFeatureDetectionForInspector",
      status: "stable",
    },
    {
      name: "TransferableStreams",
      status: "stable",
      origin_trial_feature_name: "RTCInsertableStreams",
      implied_by: ["RTCInsertableStreams"],
    },
    // This is conditionally set if the platform supports translation.
    {
      name: "TranslateService"
    },
    {
      name: "TrustedDOMTypes",
      status: "stable",
    },
    {
      name: "TrustedTypeBeforePolicyCreationEvent",
      status: "experimental",
    },
    {
      name: "TrustedTypesUseCodeLike",
      status: "experimental",
    },
    {
      name: "TrustTokens",
      origin_trial_feature_name: "TrustTokens",
      origin_trial_allows_third_party: true,
      status: "test",
    },
    {
      // 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: "TrustTokensAlwaysAllowIssuance",
      status: "test",
    },
    // This is a reverse OT used for a phased deprecation of Cryptotoken, the
    // component extension that implements the U2F security key API.
    // https://crbug.com/1224886
    {
      name: "U2FSecurityKeyAPI",
      origin_trial_feature_name: "U2FSecurityKeyAPI",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      origin_trial_type: "deprecation",
    },
    {
      name: "UnclosedFormControlIsInvalid",
      status: "experimental",
    },
    {
      name: "UnderlineOffsetThickness",
      status: "stable",
    },
    // This is a reverse OT used for a phased deprecation, on desktop
    // https://crbug.com/1071424
    {
      name: "UnrestrictedSharedArrayBuffer",
      origin_trial_feature_name: "UnrestrictedSharedArrayBuffer",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
    },
    {
      name: "URLPattern",
      status: "stable",
    },
    {
      name: "URLPatternCompareComponent",
      status: "experimental",
    },
    {
      name: "UserActivationSameOriginVisibility",
    },
    {
      name: "UserAgentClientHint",
      status: "stable",
    },
    {
      name: "UserAgentClientHintFullVersionList",
      status: "experimental",
    },
    {
      name: "UserAgentReduction",
      origin_trial_feature_name: "UserAgentReduction",
      origin_trial_allows_third_party: true,
      // iOS not included as it should not send a reduced User-Agent string.
      origin_trial_os: ["android", "chromeos", "fuchsia", "linux", "mac", "win"],
    },
    {
      name: "UUID",
      status: "stable"
    },
    {
      name: "V8IdleTasks",
    },
    {
      // Whether a video element should automatically play fullscreen unless
      // 'playsinline' is set.
      name: "VideoAutoFullscreen",
      settable_from_internals: true,
    },
    {
      name: "VideoFullscreenOrientationLock",
    },
    {
      name: "VideoPlaybackQuality",
      status: "stable",
    },
    {
      name: "VideoRotateToFullscreen",
    },
    {
      name: "VideoWakeLockOptimisationHiddenMuted",
      status: "stable",
    },
    {
      name: "ViewportHeightClientHintHeader",
      status: "experimental",
    },
    {
      name: "ViewportSegments",
      status: "experimental",
    },
    {
      name: "VirtualKeyboard",
      status: "stable",
    },
    {
      name: "VisibilityCollapseColumn",
    },
    {
      name: "VisibilityStateEntry",
      status: "experimental",
    },
    {
      // The "WakeLock" feature was originally implied_by "ScreenWakeLock" and
      // "SystemWakeLock". The former was removed after being promoted to
      // stable, but we need to keep this feature around for code and IDLs that
      // should work with both screen and system wake locks.
      name: "WakeLock",
      status: "stable",
      implied_by: ["SystemWakeLock"],
    },
    {
      name: "WebAnimationsAPI",
      status: "stable",
      implied_by: ["AnimationWorklet"],
    },
    {
      name: "WebAnimationsSVG",
      status: "experimental",
    },
    {
      name: "WebAppLaunchHandler",
      status: "experimental",
    },
    {
      name: "WebAppLaunchQueue",
      // This is not going into origin trial, "origin_trial_feature_name" is
      // required for using the "implied_by" behaviour.
      origin_trial_feature_name: "WebAppLaunchQueue",
      implied_by: ["WebAppLaunchHandler", "FileHandling"],
    },
    {
      name: "WebAppLinkCapturing",
      origin_trial_feature_name: "WebAppLinkCapturing",
      origin_trial_os: ["chromeos"],
    },
    {
      // This flag enables the Manifest parser to handle id field.
      // Also enabled when blink::features::kWebAppEnableManifestId is
      // overridden on the command line (or via chrome://flags).
      name: "WebAppManifestId",
      status: "experimental",
    },
    {
      name:"WebAppsLockScreen",
      status:"experimental",
    },
    {
      name: "WebAppTabStrip",
      status: "experimental",
    },
    {
      name: "WebAppTranslations",
      status: "experimental",
    },
    {
      // This flag enables the Manifest parser to handle URL Handlers.
      // Also enabled when blink::features::kWebAppEnableUrlHandlers is
      // overridden on the command line (or via chrome://flags).
      name: "WebAppUrlHandling",
      status: "experimental",
      origin_trial_feature_name: "WebAppUrlHandling",
      origin_trial_os: ["win", "mac", "linux"],
    },
    {
      name: "WebAppWindowControlsOverlay",
      origin_trial_feature_name: "WebAppWindowControlsOverlay",
      origin_trial_os: ["win", "mac", "linux"],
      status: "experimental",
    },
    {
      name: "WebAssemblyCSP",
      status: "stable",
    },
    {
      name: "WebAssemblyDynamicTiering",
      origin_trial_feature_name: "WebAssemblyDynamicTiering",
      status: "test",
    },
    {
      name: "WebAssemblyExceptions",
      origin_trial_feature_name: "WebAssemblyExceptions",
      status: "test",
    },
    // WebAuth is disabled on Android versions prior to N (7.0) due to lack of
    // supporting APIs, see runtime_features.cc.
    {
      name: "WebAuth",
      status: "stable",
    },
    // When enabled adds the authenticator attachment used for registration and
    // authentication to the public key credential response.
    {
      name: "WebAuthAuthenticatorAttachment",
      status: "test"
    },
    // A more subtle UI for WebAuthn that is web exposed. Under development.
    // It's controlled by the corresponding Chromium feature which needs to
    // be enabled to make the whole feature work.
    {
      name: "WebAuthenticationConditionalUI",
    },
    {
      name: "WebAuthenticationLargeBlobExtension",
      status: "experimental",
    },
    {
      name: "WebAuthenticationResidentKeyRequirement",
      status: "stable",
    },
    // WebBluetooth is enabled by default on Android, ChromeOS and Mac.
    // It is also supported in Windows 10 which is handled in runtime_features.cc
    {
      name: "WebBluetooth",
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        "Mac": "stable",
        "default": "experimental",
      },
    },
    {
      name: "WebBluetoothGetDevices",
      status: "experimental",
    },
    // WebBluetoothManufacturerDataFilter is enabled by default on Android,
    // ChromeOS and Mac. It is also supported in Windows 10 which is handled in
    // runtime_features.cc
    {
      name: "WebBluetoothManufacturerDataFilter",
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        "Mac": "stable",
        "default": "experimental",
      },
    },
    {
      name: "WebBluetoothRemoteCharacteristicNewWriteValue",
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        "Mac": "stable",
        "default": "experimental",
      },
    },
    {
      name: "WebBluetoothScanning",
      status: "experimental",
    },
    {
      name: "WebBluetoothWatchAdvertisements",
      status: "experimental",
    },
    {
      name: "WebCodecs",
      status: "stable",
      origin_trial_feature_name: "WebCodecs"
    },
    {
      name: "WebCryptoCurve25519",
      status: "experimental",
    },
    {
      name: "WebGLDeveloperExtensions",
      status: "experimental",
    },
    {
      name: "WebGLDraftExtensions",
      status: "experimental",
    },
    {
      name: "WebGLImageChromium",
    },
    // WebGPU adds a large attack surface area to the GPU process and allows
    // running arbitrary programs on the GPU (compute shaders), which may
    // perform arbitrary read/writes of GPU memory if not properly sandboxed.
    // That's why it is not enabled as part of the
    // --enable-experimental-web-platform-features flag.
    {
      name: "WebGPU",
      origin_trial_feature_name: "WebGPU",
    },
    {
      // Requires both WebGPU and --enable-experimental-web-platform-features
      name: "WebGPUImportTexture",
      status: "experimental",
    },
    {
      name: "WebHID",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "WebID",
      status: "test",
    },
    {
      name: "WebNFC",
      status: {"Android": "stable", "default": "test"},
    },
    {
      name: "WebOTP",
      status: "stable",
    },
    {
      name: "WebOTPAssertionFeaturePolicy",
      depends_on: ["WebOTP"],
      status: "stable",
    },
    {
      name: "WebScheduler",
      status: "stable",
    },
    // WebShare is enabled by default on Android.
    {
      name: "WebShare",
      status: "test",
    },
    {
      name: "WebSocketStream",
      status: "experimental",
    },
    {
      name: "WebTransport",
      status: "stable",
    },
    {
      name: "WebTransportCustomCertificates",
      origin_trial_feature_name: "WebTransportCustomCertificates",
      status: "experimental",
      depends_on: ["WebTransport"],
    },
    {
      name: "WebUSB",
      status: "stable",
    },
    {
      name: "WebUSBOnDedicatedWorkers",
      status: "stable",
      depends_on: ["WebUSB"],
    },
    {
      name: "WebVTTRegions",
      status: "experimental",
    },
    {
      name: "WebXR",
      status: "stable",
    },
    {
      name: "WebXRAnchors",
      depends_on: ["WebXRARModule", "WebXRHitTest"],
      status: "stable"
    },
    {
      name: "WebXRARModule",
      depends_on: ["WebXR"],
      status: "stable",
    },
    {
      name: "WebXRCameraAccess",
      depends_on: ["WebXRARModule"],
      status: "experimental",
    },
    {
      name: "WebXRDepth",
      origin_trial_feature_name: "WebXRDepth",
      depends_on: ["WebXRARModule"],
      status: "stable",
    },
    {
      name: "WebXRHandInput",
      depends_on: ["WebXRARModule"],
      status: "experimental"
    },
    {
      name: "WebXRHitTest",
      depends_on: ["WebXRARModule"],
      status: "stable",
    },
    {
      name: "WebXRHitTestEntityTypes",
      depends_on: ["WebXRHitTest"],
      status: "experimental"
    },
    {
      name: "WebXRImageTracking",
      origin_trial_feature_name: "WebXRImageTracking",
      depends_on: ["WebXRARModule"],
      status: "experimental",
    },
    {
      name: "WebXRLightEstimation",
      depends_on: ["WebXRARModule"],
      status: "stable",
    },
    {
      name: "WebXRPlaneDetection",
      origin_trial_feature_name: "WebXRPlaneDetection",
      depends_on: ["WebXRARModule"],
      status: "experimental",
    },
    {
      name: "WebXRViewportScale",
      depends_on: ["WebXRARModule"],
      status: "stable",
    },
    // Extends window placement functionality for multi-screen devices. Also
    // exposes requisite information about displays connected to the device.
    {
      name: "WindowPlacement",
      origin_trial_feature_name: "WindowPlacementOT2",
      status: "experimental",
    },
    {
      name: "XSLT",
      status: "stable",
    },
  ],
}