Marks navigations as aborted when the NavigationHandle is destroyed mid
navigation, likely due to a tab closure. This is a kill switch.

Capture Android key event objects to send them to the web contents when the
IME sends composition texts.

Enables the caret browsing a11y feature - can use arrow keys to navigate
through web pages.

DevTools frontend for Android.

Enables media to continue playing in the background.

Fallback to next named service slot if launching a privileged service process
hangs. In practice, this means if GPU launch hanges, then retry it once.

Enables IMEs to insert media content such as images, gifs and stickers.

Enables a blur animation of the current page when navigating away from it.

Enables the physical keyboard autocorrect underline feature.

Blocks the misspelling suggestion span in composition mode.

Warm up a spare renderer after each navigation on Android.

Whether to allow attaching an inner WebContents not owned by the outer
WebContents. This is for prototyping purposes and should not be enabled in
production.

Launches the audio service on the browser startup.

Runs the audio service in a separate process.

Enables the audio-service sandbox. This feature has an effect only when the
kAudioServiceOutOfProcess feature is enabled.

Kill switch for Background Fetch.

Enable using the BackForwardCache.

Set a time limit for the page to enter the cache. Disabling this prevents
flakes during testing.

BackForwardCacheMemoryControls is enabled only on Android to disable
BackForwardCache for lower memory devices due to memory limitations.

WHen this flag is enabled, the cookies modification without cookie value
change will not cause eviction of the back/forward cache entries with
Cache-control: no-store header.

If enabled, skips over ad-related entries that were silently inserted into
session history when navigating via back/forward buttons. This extends the
existing history manipulation intervention logic.
See https://crbug.com/375523824.

If enabled, makes battery saver request heavy align wake ups.

Broker file operations on disk cache in the Network Service.
This is no-op if the network service is hosted in the browser process.

Allows the decision to bypass redirect checks to be made based on the
specific request.

Allows pages with cache-control:no-store to enter the back/forward cache.
Feature params can specify whether pages with cache-control:no-store can be
restored if cookies change / if HTTPOnly cookies change.
TODO(crbug.com/40189625): Remove this feature and clean up.

Clear the window.name property for the top-level cross-site navigations that
swap BrowsingContextGroups(BrowsingInstances).

Enables deferring the creation of the speculative RFH when the navigation
starts. The creation of a speculative RFH consumes about 2ms and is blocking
the network request. With this feature the creation will be deferred until
the browser initializes the network request. The speculative RFH will be
created while the network service is sending the request in parallel.

When a device bound session
(https://github.com/w3c/webappsec-dbsc/blob/main/README.md) is
terminated, evict pages with cache-control:no-store from the
BFCache. Note that if kCacheControlNoStoreEnterBackForwardCache is
disabled, no such pages will be in the cache.

Whether DevTools Live Edit (Debugger.setScriptSource usage in CDP) is
enabled.

Controls whether the Digital Goods API is enabled.
https://github.com/WICG/digital-goods/

Enables the BTM (Bounce Tracking Mitigation) feature.
On by default to allow for collecting metrics. All potentially dangerous
behavior (database persistence, storage deletion) will be gated by params.

Flag used to control the TTL for user interactions (separately from the
|kBtm| feature flag).

Enables HW decode acceleration for WebRTC.

Enables HW encode acceleration for WebRTC.

Enables a discard operation on WebContents to free associated resources.
Eliminates the need to destroy the WebContents object to free its resources.

When this feature is enabled, partial storage cleanup will be
disabled for the GPU disk cache. (Performance improvement)

Enable drawing under System Bars within DisplayCutout.

Enables canvas 2d methods BeginLayer and EndLayer.

Ensures the renderer is not dead when getting the process host for a site
instance.

Enables JavaScript API to intermediate federated identity requests.
Note that actual exposure of the FedCM API to web content is controlled
by the flag in RuntimeEnabledFeatures on the blink side. See also
the use of kSetOnlyIfOverridden in content/child/runtime_features.cc.
We enable it here by default to support use in origin trials.

Kill switch for checking if there is an ongoing embedder task in the auto
re-authn flow.

Enables RPs to enhance autofill with federated accounts fetched by the FedCM
API.

Enables the FedCM ambient UI.

Enables usage of the FedCM Delegation API.

Enables the FedCM email verification protocol.

Enforce same-origin check for dedicated worker script URLs.
See https://crbug.com/496253755.

Enables the spec-compliant 'error' attribute in IdentityCredentialError while
deprecating the legacy 'code' attribute.

Enables usage of the FedCM IdP Registration API.

Enables Lightweight FedCM Mode

Enables usage of the FedCM API with metrics endpoint at the same time.

Enables FedCM to support login request initiated by the embedder.

Enables Nonce usage in Params

Controls whether FedCM requires explicit endpoint declaration in well-known
files when client_metadata is used. When enabled, accounts_endpoint and
login_url must be present in .well-known/web-identity for privacy validation.

Enables bypassing the well-known file enforcement.

Enables usage of the FedCM IdP-Initiation API.

Enables browser-side focus verification when crossing fenced boundaries.

Whether a memory pressure signal in a renderer should be forwarded to Blink
isolates. Forwarding the signal triggers a GC (critical) or starts
incremental marking (moderate), see v8::Heap::CheckMemoryPressure.

Enables the Digital Credential API.

Enables the Digital Credentials Creation API.

Enables scrollers inside Blink to store scroll offsets in fractional
floating-point numbers rather than truncating to integers.

Puts network quality estimate related Web APIs in the holdback mode. When the
holdback is enabled the related Web APIs return network quality estimate
set by the experiment (regardless of the actual quality).

Whether GuestViews (see components/guest_view/README.md) are implemented
using MPArch inner pages. See https://crbug.com/40202416

This flag unconditionally enables the SQLite backing store. Used for
about:flags.

Controls whether we ignore duplicate navigations or not, in favor of
preserving the already ongoing navigation.

Enables rendering the top chrome in WebUI. This is a central flag to enable
the WebUI implementation of top chrome. Individual features will be
additionally gated by this flag.

Whether initial WebUI navigations should synchronously go from navigation
start to commit, by doing e.g. in-renderer body loading.

Kill switch for the GetInstalledRelatedApps API.

Allow Windows specific implementation for the GetInstalledRelatedApps API.

When enabled, derives isolate priority from the more granular process
priority (user-blocking, user-visible, best-effort) instead of renderer
visibility (visible, hidden).

Subtlety: A renderer hosting a hidden frame playing audio will have
user-blocking priority. Without this feature, an isolate in this renderer
would have best-effort priority (derived from the visibility), whereas with
the feature it would be user-blocking. To keep isolates in hidden renderers
at best-effort priority, but otherwise use the process priority, enable this
feature along with "IsolatesPriorityBestEffortWhenHidden".

When enabled, forces the priority of isolates in hidden renderers to
best-effort, overriding the effect of kIsolatesPriorityUseProcessPriority
(isolates in visible renderer will still get their priority derived from
process priority).

Enable support for isolated web apps. This will guard features like serving
isolated web apps via the isolated-app:// scheme, and other advanced isolated
app functionality. See https://github.com/reillyeon/isolated-web-apps for a
general overview.
Please don't use this feature flag directly to guard the IWA code.  Use
IsolatedWebAppsPolicy::AreIsolatedWebAppsEnabled() in the browser process or
check kEnableIsolatedWebAppsInRenderer command line flag in the renderer
process.

Enables process isolation of fenced content (content inside fenced frames)
from non-fenced content. See
https://github.com/WICG/fenced-frame/blob/master/explainer/process_isolation.md
for rationale and more details.

Alternative to switches::kIsolateOrigins, for turning on origin isolation.
List of origins to isolate has to be specified via
kIsolateOriginsFieldTrialParamName.

When enabled, creation of the BrowserInterfaceBroker on RenderFrameHostImpls
becomes lazy. i.e. the BrowserInterfaceBroker is constructed only when it is
needed, typically when a renderer process becomes associated with the frame.
See https://crbug.com/450912216 for more details.

If this is enabled, LoadingPredictor restricts the number of preconnects for
the same destination to one.

The MBI mode controls whether or not communication over the
AgentSchedulingGroup is ordered with respect to the render-process-global
legacy IPC channel, as well as the granularity of AgentSchedulingGroup
creation. This will break ordering guarantees between different agent
scheduling groups (ordering withing a group is still preserved).
DO NOT USE! The feature is not yet fully implemented. See crbug.com/1111231.

Controls the configurablity of the navigation confidence noise level.
If the feature is not enabled, then the epsilon value will be 1.1.

When NavigationNetworkResponseQueue is enabled, the browser will schedule
some tasks related to navigation network responses in a kHigh priority
queue.

If the network service is enabled, runs it in process.

Feature which disables caching a previous selection menu object.

Feature which holdbacks NoStatePrefetch on all surfaces.

Controls the Origin-Agent-Cluster header. Tracking bug
https://crbug.com/1042415; flag removal bug (for when this is fully launched)
https://crbug.com/1148057.

The name is "OriginIsolationHeader" because that was the old name when the
feature was under development.

History navigation in response to horizontal overscroll (aka gesture-nav).

Whether web apps can run periodic tasks upon network connectivity.

Allow starting prefetch request from off the main thread. Please see
crbug.com/452389538 for more details.

Use code paths for prefetch/prerender integration.
See also kPrerender2FallbackPrefetchSpecRules.

If explicitly disabled, prefetch proxy is not used.

Killswitch for UA override issue fix (crbug.com/441612842) in preloading.

If enabled, the feature allows the prerender host to be reused for the
future same-site page prerender if marked as reusable.

If enabled, the feature allows user to see a preview of their handwriting
gestures (Select and Delete gestures).

Enables exposure of ads APIs in the renderer: Attribution Reporting,
FLEDGE, Topics, along with a number of other features actively in development
within these APIs.

When enabled, ProcessSelectionDeferringConditions will be run. This allows
the embedder to provide conditions that may delay the final process selection
until the conditions have their results.

Enables origin-keyed processes by default, unless origins opt out using
Origin-Agent-Cluster: ?0. This feature only takes effect if the Blink feature
OriginAgentClusterDefaultEnable is enabled, since origin-keyed processes
require origin-agent-clusters.

Fires the pushsubscriptionchange event defined here:
https://w3c.github.io/push-api/#the-pushsubscriptionchange-event
for subscription refreshes, revoked permissions or subscription losses

Fires the pushsubscriptionchange event defined here:
https://w3c.github.io/push-api/#the-pushsubscriptionchange-event
upon manual resubscription to previously unsubscribed notifications.

When enabled, sends SubresourceResponseStarted IPC only when the user has
allowed any HTTPS-related warning exceptions. From field data, ~100% of
subresource notifications are not required, since allowing certificate
exceptions by users is a rare event. Hence, if user has never allowed any
certificate or HTTP exceptions, notifications are not sent to the browser.
Once we start sending these messages, we keep sending them until all
exceptions are revoked and browser restart occurs.

Enable using the RenderDocument.

Restrict the maximum number of concurrent ThreadPool tasks when a renderer is
low priority.

When enabled, sends the spare renderer information when setting the
priority of renderers. Currently only Android handles the spare renderer
information in priority.
The target priority of a spare renderer in Android is decided by the feature
parameters in ContentFeatureList.java.

When enabled, the IPC channel will not be paused when launching non-guest
renderer processes. This makes it possible for all kinds of mojo calls
to be sent to the renderer process before OnProcessLaunched fires. When the
feature is disabled, those messages are instead queued because the IPC
channel is paused, and only flushed at OnProcessLaunched.

When enabled, skip pagehide-in-commit when navigating to DSE.
(See: https://crbug.com/375385416)

Reuses RenderProcessHost up to a certain threshold. This mode ignores the
soft process limit and behaves just like a process-per-site policy for all
sites, with an additional restriction that a process may only be reused while
the number of main frames in that process stays below a threshold.

Enables auto preloading for fetch requests before invoking the fetch handler
in ServiceWorker. The fetch request inside the fetch handler is resolved with
this preload response. If the fetch handler result is fallback, uses this
preload request as a fallback network request.

Unlike navigation preload, this preloading is applied to subresources. Also,
it doesn't require a developer opt-in.

crbug.com/1472634 for more details.

crbug.com/374606637: When this is enabled, race-network-and-fetch-hander will
prioritize the response processing for the network request over the
processing for the fetch handler.

Run video capture service in the Browser process as opposed to a dedicated
utility process.

Update scheduler settings using resourced on ChromeOS.

Browser-side feature flag for Secure Payment Confirmation (SPC) that also
controls the render side feature state. SPC is not currently available on
Linux or ChromeOS, as it requires platform authenticator support.

Used to control whether to remove the restriction that PaymentCredential in
WebAuthn and secure payment confirmation method in PaymentRequest API must
use a user verifying platform authenticator. When enabled, this allows using
such devices as UbiKey on Linux, which can make development easier.

Service worker based payment apps as defined by w3c here:
https://w3c.github.io/webpayments-payment-apps-api/
TODO(rouslan): Remove this.

If enabled, UI thread tasks can check ServiceWorker registration information
from the thread pool without waiting for running the receiving task. Please
see crbug.com/421530699 for more details.

http://tc39.github.io/ecmascript_sharedmem/shmem.html
This feature is also enabled independently of this flag for cross-origin
isolated renderers.

If enabled, GetUserMedia API will only work when the concerned tab is in
focus

This is intended as a kill switch for the WebOTP Service feature. To enable
this feature, the experimental web platform features flag should be set.

Trial to disable synchronous draw for synchronous compositor (ie Android
WebView).

Enable the web lockscreen API implementation
(https://github.com/WICG/lock-screen) in Chrome.

When enabled, puts subframe data: URLs in a separate SiteInstance in the same
SiteInstanceGroup as the initiator.

When enabled, puts non-isolated sites in separate SiteInstances in a default
SiteInstanceGroup (per BrowsingInstance), rather than sharing a default
SiteInstance.

Controls whether to isolate sites of documents that specify an eligible
Cross-Origin-Opener-Policy header.  Note that this is only intended to be
used on Android, which does not use strict site isolation. See
https://crbug.com/1018656.

When enabled, OOPIFs will not try to reuse compatible processes from
unrelated tabs.

Controls whether SpareRenderProcessHostManager tries to always have a warm
spare renderer process around for the most recently requested BrowserContext.
This feature is only consulted in site-per-process mode.

Controls whether site isolation should use origins instead of scheme and
eTLD+1.

Disallows window.{alert, prompt, confirm} if triggered inside a subframe that
is not same origin with the main frame.

Dispatch touch events to "SyntheticGestureController" for events from
Devtool Protocol Input.dispatchTouchEvent to simulate touch events close to
real OS events.

This feature allows touch dragging and a context menu to occur
simultaneously, with the assumption that the menu is non-modal.  Without this
feature, a long-press touch gesture can start either a drag or a context-menu
in Blink, not both (more precisely, a context menu is shown only if a drag
cannot be started).

Controls whether the browser should track and reuse free and empty renderer
processes. When enabled, the browser maintains a list of renderer processes
that are currently not hosting any frames and are thus eligible for reuse
when a new renderer process is needed. Currently, only background renderer
processes are considered for reuse.

This feature is for a reverse Origin Trial, enabling SharedArrayBuffer for
sites as they migrate towards requiring cross-origin isolation for these
features.
TODO(bbudge): Remove when the deprecation is complete.
https://developer.chrome.com/origintrials/#/view_trial/303992974847508481
https://crbug.com/1144104

Enables comparing browser and renderer's DidCommitProvisionalLoadParams in
RenderFrameHostImpl::VerifyThatBrowserAndRendererCalculatedDidCommitParamsMatch.

Enables a CHECK in NavigationRequest::ValidateCommitOrigin() to verify
that the origin used at commit time matches the expected origin stored
in the FrameNavigationEntry, whenever PageState is non-empty.

This helps catch session history corruption or stale origin-related state
being sent to the renderer, which could violate origin isolation and lead
to security issues (see crbug.com/41492620).

This feature is disabled by default while we diagnose on Canary only.

Enables future V8 VM features

Enables per PWA System Media Controls. Only supported on Windows and macOS.

Enable WebAssembly baseline compilation (Liftoff).

Enables WebAssembly Shared-Everything Threads.

Enable WebAssembly lazy compilation (JIT on first call).

Enable WebAssembly tiering (Liftoff -> TurboFan).

Enable WebAssembly trap handler.

Enable WebAssembly Core stack switching.
https://github.com/WebAssembly/stack-switching

Controls whether the Web Bluetooth API is enabled:
https://webbluetoothcg.github.io/web-bluetooth/

Controls whether Web Bluetooth should use the new permissions backend. The
new permissions backend uses ObjectPermissionContextBase, which is used by
other device APIs, such as WebUSB. When enabled,
WebBluetoothWatchAdvertisements and WebBluetoothGetDevices blink features are
also enabled.

Controls which backend is used to retrieve OTP on Android. When disabled
we use User Consent API.

The JavaScript API for payments on the web.

Enables code caching for scripts used on WebUI pages.

Enables build-time generated resource-bundled code caches for WebUI pages.
See crbug.com/375509504 for details.

Reports WebUI Javascript errors to the crash server on all desktop platforms.
Previously, this was only supported on ChromeOS and Linux.
Intentionally enabled by default and will be used as a kill switch in case
of regressions.

If enabled, WebUI will optimize resources loading by piping a dictionary of
URL paths to materialized WebUI resource content to the renderer via
LocalResourceLoaderConfig.
This is an extension of kWebUIInProcessResourceLoading which previously
serves only resources in resource bundle.
See crbug.com/459528908.

Controls whether the WebUSB API is enabled:
https://wicg.github.io/webusb

Apply PrefetchPriority::kHighest for Webview Prefetch API.

Controls whether the WebXR Device API is enabled.

Sets IO threads to kInteractive all the time.

Enables overriding the default subframe process shutdown delay via the
"delay_seconds" field trial parameter. This allows for experimentation with
different timeout values for keeping subframe processes alive for potential
reuse.

Blocks the misspelling suggestion span in composition mode.

The delay for creating the Android spare renderer in
SpareRenderProcessHostManager::PrepareForFutureRequests.
The parameter will not be effective if

The delay for creating the Android spare renderer in
SpareRenderProcessHostManager::PrepareForFutureRequests.
The parameter will not be effective if
spare_renderer_creation_after_stop_loading is enabled.
Since the function is called during loading, a delay is introduced to avoid
interfering with critical loading procedures.

The timeout for the created spare renderer after each navigation on Android.

The timeout for the created spare renderer after each navigation on Android.
The created renderer will be destroyed after the timeout.
A negative value indicates that no timeout will be set for the spare
renderer.

The lower memory limit to create a spare renderer after each navigation on

Kill the spare renderer when the browser goes to the background to free

Enables the audio-service sandbox. This feature has an effect only when the

Set a time limit for the page to enter the cache. Disabling this prevents
flakes during testing.

BackForwardCache is disabled on low memory devices. The threshold is defined
via a field trial param: "memory_threshold_for_back_forward_cache_in_mb"

"BackForwardCacheMemoryControls" is checked before "BackForwardCache". It
means the low memory devices will activate neither the control group nor the
experimental group of the BackForwardCache field trial.

If enabled, skips over ad-related entries that were silently inserted into
session history when navigating via back/forward buttons. This extends the
existing history manipulation intervention logic.

If enabled, makes battery saver request heavy align wake ups.

Allows the decision to bypass redirect checks to be made based on the

Clear the window.name property for the top-level cross-site navigations that
swap BrowsingContextGroups(BrowsingInstances).

Enable drawing under System Bars within DisplayCutout.

Enables JavaScript API to intermediate federated identity requests.
Note that actual exposure of the FedCM API to web content is controlled
by the flag in RuntimeEnabledFeatures on the blink side. See also
the use of kSetOnlyIfOverridden in content/child/runtime_features.cc.

Enables RPs to enhance autofill with federated accounts fetched by the FedCM
API.

Enables the spec-compliant 'error' attribute in IdentityCredentialError while
deprecating the legacy 'code' attribute.

Enables usage of the FedCM IdP Registration API.

Whether a memory pressure signal in a renderer should be forwarded to Blink
isolates. Forwarding the signal triggers a GC (critical) or starts

Enables the Digital Credential API.

Puts network quality estimate related Web APIs in the holdback mode. When the

This flag unconditionally enables the SQLite backing store. Used for

When NavigationNetworkResponseQueue is enabled, the browser will schedule
some tasks related to navigation network responses in a kHigh priority

If the network service is enabled, runs it in process.

Enables origin-keyed processes by default, unless origins opt out using
Origin-Agent-Cluster: ?0. This feature only takes effect if the Blink feature
OriginAgentClusterDefaultEnable is enabled, since origin-keyed processes
require origin-agent-clusters.

Fires the pushsubscriptionchange event defined here:

When enabled, sends SubresourceResponseStarted IPC only when the user has
allowed any HTTPS-related warning exceptions. From field data, ~100% of
subresource notifications are not required, since allowing certificate

When a Web application is video-capturing a tab, it can use the Region
Capture API to crop the resulting video.
- If kRegionCaptureOfOtherTabs is disabled, the Web application can only

When a Web application is video-capturing a tab, it can use the Region
Capture API to crop the resulting video.
- If kRegionCaptureOfOtherTabs is disabled, the Web application can only
crop self-capture tracks. (That is, cropping is only possible when the
application is capturing its own tab.)
- If kRegionCaptureOfOtherTabs is enabled, the Web application  can crop
video-captures of any tab (so long as that other tab collaborates by sending
a CropTarget).

RenderDocument:

RenderDocument:

Currently, a RenderFrameHost represents neither a frame nor a document, but a
frame in a given process. A new one is created after a different-process

RenderDocument:

Currently, a RenderFrameHost represents neither a frame nor a document, but a
frame in a given process. A new one is created after a different-process
navigation. The goal of RenderDocument is to get a new one for each document
instead.

RenderDocument:

Currently, a RenderFrameHost represents neither a frame nor a document, but a
frame in a given process. A new one is created after a different-process
navigation. The goal of RenderDocument is to get a new one for each document
instead.

Design doc: https://bit.ly/renderdocument
Main bug tracker: https://crbug.com/936696

If enabled, set a soft limit on the number of renderer processes on

If enabled, set a soft limit on the number of renderer processes on
Android, after which Chrome will reuse existing processes when possible.
This diverges from current Clank behavior, where we do not set any upper
bound and instead delegate that to the system. 42 is approximated from
8GBs ((8192 - 1024) / (16384 / 96)), and has nothing to do with Douglas

When enabled, the IPC channel will not be paused when launching non-guest
renderer processes. This makes it possible for all kinds of mojo calls

Disabled by default on ChromeOS because of ChromeOS-only
regressions at crbug.com/458372810.

Used to control whether to remove the restriction that PaymentCredential in
WebAuthn and secure payment confirmation method in PaymentRequest API must
use a user verifying platform authenticator. When enabled, this allows using
such devices as UbiKey on Linux, which can make development easier.

If enabled, UI thread tasks can check ServiceWorker registration information

Supports x-on-meet-coop interop implementation.
TODO: crbug.com/398741358 - clean up this temporary workaround after
https://crbug.com/333029146 replaces COOP restrict-properties.

If enabled, GetUserMedia API will only work when the concerned tab is in
focus

This is intended as a kill switch for the WebOTP Service feature. To enable
this feature, the experimental web platform features flag should be set.

Trial to disable synchronous draw for synchronous compositor (ie Android

Enabled by default on Android only; see https://crbug.com/1206770.

This feature param (true by default) controls whether sites are persisted
across restarts.

This feature param controls the maximum size of stored sites.  Only used

This feature param controls the period of time for which the stored sites

Disallows window.{alert, prompt, confirm} if triggered inside a subframe that
is not same origin with the main frame.

Dispatch touch events to "SyntheticGestureController" for events from
Devtool Protocol Input.dispatchTouchEvent to simulate touch events close to
real OS events.

This feature allows touch dragging and a context menu to occur
simultaneously, with the assumption that the menu is non-modal.  Without this
feature, a long-press touch gesture can start either a drag or a context-menu

Controls whether the browser should track and reuse free and empty renderer
processes. When enabled, the browser maintains a list of renderer processes
that are currently not hosting any frames and are thus eligible for reuse
when a new renderer process is needed. Currently, only background renderer

Enables a CHECK in NavigationRequest::ValidateCommitOrigin() to verify
that the origin used at commit time matches the expected origin stored
in the FrameNavigationEntry, whenever PageState is non-empty.

Enables a CHECK in NavigationRequest::ValidateCommitOrigin() to verify
that the origin used at commit time matches the expected origin stored
in the FrameNavigationEntry, whenever PageState is non-empty.

This helps catch session history corruption or stale origin-related state
being sent to the renderer, which could violate origin isolation and lead
to security issues (see crbug.com/41492620).

This feature is disabled by default while we diagnose on Canary only.

Windows enabled since 124.

When this feature is enabled, the accessibility tree will be requested to
signal content changed events next to a boolean value that will determine if
this event should cause a nodes's children to be rerendered if there've been
structural changes.

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 This flag changes about:blank to dark in dark mode on user action.

 If the author did not define aria-actions, surface button and link
 children inside option and menuitem elements as implicit actions.

 Use a minimum role of group on elements that are keyboard-focusable.
 See https://w3c.github.io/html-aam/#minimum-role.

 Enforce no accessible name on objects that have a role where names are
 prohibited (listed in https://w3c.github.io/aria/#namefromprohibited):
 log a friendly error in the developer console, and trigger a DCHECK().
 The incorrect markup situation will be repaired, and the name will
 be exposed as a description instead.
 TODO(crbug.com/350528330,
 https://github.com/web-platform-tests/interop-accessibility/issues/133,
 https://github.com/w3c/accname/issues/240,
 https://github.com/w3c/accname/issues/241): If community feedback is
 positive, and WPT + accname testable statements are updated to allow
 this, then add status: test.

 https://chromestatus.com/feature/5113389252739072
 https://issues.chromium.org/issues/41119923

 Interest Group JS API/runtimeflag.

 Fix for crbug.com/403358869

 Adjust the end of the next paragraph if the end position for the
 paragraph is updated while moving the paragraph. See
 https://crbug.com/329121649

 Whether to automatically build an APC content_extraction tree on load.

 Whether to enforce geometry invariants in AIPageContentAgent.
 Only supported for DCHECK-enabled builds.

 Ensures that text content extracted from DOM nodes are valid UTF-8 Before
 providing them to consumers of AIPageContent.

 When enabled, redact elements with --webkit-text-security.

 Use MapToVisualRectInAncestorSpace for outer bounding boxes, for
 math consistent with visual bounding boxes.

 Clamp AIPageContent visible bounding boxes to the local-root viewport
 after visual-viewport mapping to normalize viewport-relative geometry.

 Extension access to "AIPromptAPI".

 Gates access to legacy aliases of renamed "AIPromptAPI" identifiers.
 TODO(crbug.com/498228550): Remove after extension context usage drops.

 Gates access to legacy sampling parameter surfaces for "AIPromptAPI".
 Enabled in extension contexts, and for API enhancement experiments.

 Gates access to inference parameter enhancements for "AIPromptAPI".
 This feature alone does not expose any "AIPromptAPI" feature access.

 Gates access to the responseConstraint enhancement for "AIPromptAPI".
 This feature alone does not expose any "AIPromptAPI" feature access.

 Gates access to the tool use (function calling) enhancement for
 "AIPromptAPI". This feature alone does not expose any "AIPromptAPI"
 feature access.

 https://crbug.com/40681200

 Instead of creating a new DOMStringList on every access to
 location.ancestorOrigins, return the ancestor origins list
 stored on Document.
 This was added in M147 and can be removed after M149.
 https://issues.chromium.org/issues/483610021

 Enables the new behavior for this spec change:
 https://github.com/whatwg/html/pull/11457
 https://issues.chromium.org/issues/433545121
 https://chromestatus.com/feature/5179013869993984

 This is a bug fix for rendering a missing focus ring on <a> elements.
 Shipping in M147, safe to remove in M150.

 Kill switch for https://crbug.com/415834974 which changes anchor
 positioning adjustments to occur even in cases where there is no
 scrollable overflow.

 https://chromestatus.com/feature/5083257285378048

 https://drafts.csswg.org/web-animations-2/#triggers

 appearance:base for in-page form controls.
 https://drafts.csswg.org/css-forms-1/
 https://issues.chromium.org/issues/450139531
 https://chromestatus.com/feature/5104958101913600

 When enabled, perform async IPCs from CookieJar::SetCookie to the
 network service.

 The transition to "running" after construction happens asynchronously.
 Same for the transition to "suspended" after suspend() is called.
 https://webaudio.github.io/web-audio-api/#AudioContext-constructors

 AudioContext.playbackStats interface.

 AudioContext.playoutStats interface.
 https://chromestatus.com/feature/5172818344148992

 https://drafts.csswg.org/css-scroll-snap

 Fix for https://crbug.com/471876082

 If the start and end positions are the same in MoveParagraph,
 there is no need to collapse the whitespace between them.
 https://crbug.com/406053617

 When enabled, enforces new interoperable semantics for 3D transforms.
 See crbug.com/1008483.

 A developer opt-out for background page freezing.

 Whether MapToVisualRectInAncestorSpace() with a null ancestor can
 use the geometry mapper fast path.

 https://chromestatus.com/feature/4830298126417920

 Prevents the popup document for the select element from being opened
 if the corresponding OS window is not focused. Enabled in M147, can be
 removed in M150.

 https://crbug.com/415304289: Mouse and Pointer boundary event dispatch
 (i.e. dispatch of enter, leave, over, out events) tracks DOM node removal
 to fix event pairing on ancestor nodes.

 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.

 Enables RFC 7234-compliant Cache-Control header parsing, removing RFC
 2616 separators that are not valid in RFC 7234.
 https://crbug.com/42050325

 Enables metrics collection comparing RFC 7234 vs RFC 2616 Cache-Control
 parsing. Performs double parsing on every Cache-Control header to
 measure behavioral differences. Can be disabled as a kill switch if
 performance issues arise.
 https://crbug.com/42050325

 https://github.com/WICG/html-in-canvas/blob/main/README.md
 Note the API name has changed to drawElementImage.

 Canvas2D API for specifying HDR headroom for drawing operations.
 https:/crbug.com/428575083, https://github.com/whatwg/html/issues/11165

 https://crbug.com/394052224

 https://crbug.com/479240778

 Canvas2D API for specifying HDR tone mapping behavior.
 https:/crbug.com/448552449, https://github.com/whatwg/html/issues/11424

 Kill switch for https://crbug.com/330506337.

 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

 Changes the caret's affinity to upstream, preventing spaces
 from appearing in the previous line when typing at the start
 of a wrapped line. See https://crbug.com/40677155

 Kill switch for changes to RenderFrameMetadataObserverImpl in connection with Engagement
 Signals. See https://crrev.com/c/4544201 and https://crbug.com/1458640.

 If focus is not at canonical position then spellcheck should be deactivated.
 crbug.com/396485529

 Clamps word boundary detection to the contenteditable scope when
 adjacent contenteditable spans have no whitespace between them.
 See https://crbug.com/40848794.

 Set currentTarget to null after dispatch for EventTarget.
 This was added in M142 and can be removed after M144.
 https://issues.chromium.org/issues/346766786

 Fixes a bug where ancestor elements retain a stale :focus-within
 state if the focused element's subtree is removed during blur
 or focusout events.
 This was added in M147 and can be removed after M149.
 https://issues.chromium.org/issues/454668198
 https://issues.chromium.org/issues/457465869

 Determine clearing of target and relatedTarget by checking
 if the top node is in shadow tree.
 This was added in M142 and can be removed after M144.
 https://issues.chromium.org/issues/373655918
 https://issues.chromium.org/issues/40253359

 If the link has tabindex, the status bubble should not persist after
 mouse out.
 This was added in M146 and can be removed after M148.

 Enables clipboardchange event API for listening for changes to the
 system clipboard
 https://chromestatus.com/feature/5085102657503232

 This ensures that clipboard event fires on a target node which is
 focused in case no visible selection is present.
 crbug.com/40735783

 Allows usecounter in ClipboardItem

 Support ClipboardItemData of Promise<DOMString> type according to spec
 https://w3c.github.io/clipboard-apis/#typedefdef-clipboarditemdata

 TODO(crbug.com/440374239): Disabled due to https://crbug.com/440374239.

 Avoid queuing a task to fire a selectionchange event when there is already a task scheduled
 to do that for the target according to the new spec:
 https://w3c.github.io/selection-api/#scheduling-selectionhange-event

 Allows <input type=color> to accept any valid CSS color value
 (named colors, rgb(), hsl(), system colors, etc.) in addition to
 the legacy 7-character hex format (#rrggbb).
 https://crbug.com/40226268
 This was added in M146 and can be removed after M148.

 Enable the display-p3-linear color space in CSS.
 https://chromestatus.com/feature/5162372125818880

 Enable the srgb-linear and display-p3-linear color spaces in
 PredefinedColorSpace.
 https://chromestatus.com/feature/5122501071994880

 Enable the rec2100-linear color space in CSS and PredefinedColorSpace.
 https://chromestatus.com/feature/5204024772788224

 Makes the command event not composed. Launched in M141.
 https://github.com/whatwg/html/pull/11255
 https://issues.chromium.org/issues/414826954

 Return the current target from composedPath() while
 dispatching.
 This was added in M142 and can be removed after M144.
 https://issues.chromium.org/issues/444932649
 https://issues.chromium.org/issues/346766786

 When enabled, TimelineTriggers[1] will function via cc::TimelineTrigger
 objects that live on the compositor thread.
 [1] https://drafts.csswg.org/css-animations-2/#timeline-triggers

 When enabled, providing developers control over the resources loaded
 into their pages' contexts and the endpoints to which their pages can
 make requests.
 Note: To enable this feature, developers MUST include the origin trial
 token within the HTTP headers. Including the origin trial token via the
 <meta> tag in the head of any page does NOT enable the feature.
 See https://wicg.github.io/connection-allowlists/.

 Fix for https://crbug.com/40659076. When enabled, queryCommandState for
 'subscript' or 'superscript' with a caret selection will consider
 ancestor <sub> or <sup> elements, matching the behavior for range
 selections.

 Enable support for Controlled Frame, providing the Controlled
 Frame tag to IWA apps and other contexts. See
 https://github.com/WICG/controlled-frame/blob/main/README.md for more
 info.

 Enable support for requesting SecurityInfo in WebRequest API
 for controlled frames. See
 https://wicg.github.io/controlled-frame/#dictdef-securityinfo for more
 info.

 Enables setting the maxAge option when creating a cookie in the
 Cookie Store API.

 Feature flag for stripping \t and space from Cookie names and values.
 https://crbug.com/437345480

 Corrects the handling of <form> elements nested within <template> tags
 in HTML parsing. See https://crbug.com/352896478 for details.

 CPU Performance API, work in progress.
 https://chromestatus.com/feature/5189864286978048
 https://github.com/explainers-by-googlers/cpu-performance

 When enabled, allowlisting script urls and scripts used in eval via
 hashes will be supported in script-src. This is a no-op if the
 network::features::kCSPScriptSrcHashesInV1 flag is off, since it
 controls parsing in the network service.
 See crbug.com/392657736 for details.

 The AccentColor And AccentColorText CSS system color keywords

 Maps deprecated ActiveCaption to Canvas instead of CanvasText.
 https://drafts.csswg.org/css-color-4/#deprecated-system-colors
 https://crbug.com/41493724

 https://drafts.csswg.org/css-color-5/#relative-alpha
 https://chromestatus.com/feature/5070160203481088

 Allows using counter() and counters() in alt text (after / in content property).

 Let transforms affect anchor() and anchor-size() functions.

 https://drafts.csswg.org/web-animations-2/#iteration-composite-operation

 https://drafts.csswg.org/css-values-5/#early-resolution

 Whether <image> values are allowed as counter style <symbol>

 https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as

 https://chromestatus.com/feature/5459864205393920
 https://chromestatus.com/feature/5125388091260928

 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

 https://chromestatus.com/feature/5082469066604544

 https://chromestatus.com/feature/6106160780017664

 Support case-sensitive attribute selector modifier
 https://drafts.csswg.org/selectors-4/#attribute-case

 In the cases where it is impossible or impractical to determine the
 measure of the “0” glyph, it must be assumed to be 0.5em wide by 1em
 tall. Thus, the ch unit falls back to 0.5em in the general case, and to
 1em when it would be typeset upright (i.e. writing-mode is vertical-rl or
 vertical-lr and text-orientation is upright).
 https://drafts.csswg.org/css-values-4/#ch
 See crbug.com/416145497 for more details.

 https://drafts.csswg.org/css-values-5/#progress
 container-progress()

 https://drafts.csswg.org/css-conditional-5/#typedef-style-range

 https://drafts.csswg.org/css-color-5/#contrast-color

 https://drafts.csswg.org/css-borders-4/#corner-shaping

 https://drafts.csswg.org/css-lists-3/#counter-reset
 https://crbug.com/40760770

 Unprefixed cross-fade() (in addition to the existing -webkit-cross-fade()).
 https://drafts.csswg.org/css-images-4/#cross-fade-function

 Include custom properties in CSSComputedStyleDeclaration::item/length.
 https://crbug.com/949807

 crbug.com/417306102

 crbug.com/417306102

 crbug.com/483689942
 Serialize font-family names as space-separated idents when possible,
 per CSSWG resolution. See https://github.com/w3c/csswg-drafts/issues/5846.

 https://drafts.csswg.org/css-mixins-1/#function-rule

 https://chromestatus.com/feature/5157805733183488

 https://chromestatus.com/feature/5157805733183488

 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

 https://drafts.csswg.org/css-values-5/#ident

 https://chromestatus.com/feature/5078177326170112

 The inherit() function works like var(), except that it grabs
 the computed value of the specified property from the parent style
 instead of the current style.

 https://drafts.csswg.org/css-values-5/#inherit-notation

 https://chromestatus.com/feature/6289894144212992

 Support for extended language ranges in :lang()
 https://chromestatus.com/feature/5071058079055872

 light-dark() for image values (background-image, etc.)
 https://drafts.csswg.org/css-color-5/#light-dark

 This flag makes (-webkit-)line-clamp: <integer> clamp by both lines
 and height if there's also (max-)height set on the element.

 In https://github.com/w3c/csswg-drafts/issues/12041 the CSSWG resolved
 that the line-clamp: <integer> syntax couldn't have that behavior due
 to web compat, but we haven't decided on a new syntax for it yet.
 Therefore we keep the behavior under this flag for now.

 Implements counter-increment and counter-set for the non-<li>
 elements and the reversed ordered lists.

 https://crbug.com/40682542

 Allows pseudo-element selectors within logical combination pseudo-
 classes, e.g. :is(div::before).

 https://crbug.com/444386484

 https://drafts.csswg.org/css-values-5/#progress
 media-progress()

 https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle

 Ignore the stylesheet encoding when parsing URLs, always using UTF-8.
 See crbug.com/1485525.

 Support polygon(round <length>, ...) per CSS Shapes Level 1.
 Spec: https://www.w3.org/TR/css-shapes-1/#typedef-basic-shape
 Issue: https://crbug.com/329302249

 https://drafts.csswg.org/css-values-5/#progress
 progress()

 For ::column pseudo-element for fragment styling.
 https://github.com/flackr/carousel/blob/main/fragmentation/README.md

 Enables the :has-slotted pseudo-selector.
 https://chromestatus.com/feature/5134941143433216

 When an audio, video, or similar resource is "playing"
 or "paused".
 https://www.w3.org/TR/selectors-4/#video-state

 For ::scroll-up-button and ::scroll-down-button pseudo-elements for Carousel.
 https://github.com/flackr/carousel/tree/main/scroll-button

 For ::scroll-marker and ::scroll-marker-group pseudo-elements for Carousel.
 https://github.com/flackr/carousel/tree/main/scroll-marker

 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.

 The '&' pseudo-class effectively behaves like :where(:scope)
 when used in @scope rules.

 The "@import scope(...)" syntax.
 https://github.com/w3c/csswg-drafts/issues/7348

 https://drafts.csswg.org/css-conditional-5/#scrolled

 https://drafts.csswg.org/css-scroll-snap-2#scroll-initial-target

 https://github.com/w3c/csswg-drafts/issues/12122

 https://drafts.csswg.org/css-overflow-5/#active-before-after-scroll-markers
 :target-before and :target-after pseudo classes for scroll markers.

 https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchange

 https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchanging

 https://drafts.csswg.org/css-scroll-snap-2/#snapevent-interface

 https://drafts.csswg.org/css-scroll-snap-2/#snap-events

 scroll-target-group property
 https://drafts.csswg.org/css-overflow-5/#scroll-target-group

 scroll-target-group property sets aria-current=true on :target-current html scroll marker.

 rect() and xywh() basic shapes for shape-outside.
 https://drafts.csswg.org/css-shapes-1/#basic-shape-functions
 https://drafts.csswg.org/css-shapes/#shape-outside-property

 https://drafts.csswg.org/cssom-1/#dom-cssstylesheetinit-baseurl

 https://chromestatus.com/feature/5153932394102784

 Allows the CSS "accent-color" property to support the system accent color as the default option.

 https://issues.chromium.org/40787216: CSS text-align: match-parent value

 https://issues.chromium.org/40675832: CSS text-decoration-skip-ink: all value

 crbug.com/434361099

 crbug.com/1463890, crbug.com/1463891: CSS text-spacing shorthand

 https://crbug.com/40928177: Support of text-transform: full-size-kana

 https://issues.chromium.org/41297237: CSS text-transform: full-width value

 crbug.com/41297237: Support multi-keyword values in CSS text-transform.

 Support for the 'all' keyword of the 'timeline-scope' property.

 https://drafts.csswg.org/scroll-animations-1/#timeline-scope

 Makes timeline names global by default.

 https://github.com/w3c/csswg-drafts/issues/12581

 CSS URL request modifiers: cross-origin(), integrity(),
 referrer-policy() inside url() functions.

 https://drafts.csswg.org/css-values-5/#request-url-modifiers

 Support for user-select:contain.

 https://crbug.com/488305665: Support :user-valid/:user-invalid for radio buttons.
 This lands in M147, and the flag can be removed in M149.

 https://drafts.csswg.org/selectors-4/#user-valid-pseudo

 https://chromestatus.com/feature/4850737974345728

 Shipping in M148 (or backported earlier), can be removed in M150.

 appearance:base for the <datalist> element when it is invoked as a
 picker from an <input type=text>.
 https://issues.chromium.org/issues/453705243
 https://chromestatus.com/feature/5067156794507264

 appearance:base-select for <select multiple size=1> with a picker.

 see crbug.com/341313078

 https://chromestatus.com/feature/5134293578285056

 crbug.com/40153320

 https://crbug.com/448174611

 https://crbug.com/448174611

 https://chromestatus.com/feature/5133099851317248

 https://chromestatus.com/feature/5133099851317248

 Killswitch for https://crbug.com/400317114 fix.
 This lands in M142, and the flag can be removed in M144.

 Delete text from descendant text nodes before removing children of
 a root editable element to ensure selectionchange event fires.

 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

 This feature makes the <dialog> element close properly when its "open"
 attribute is removed. https://github.com/whatwg/html/issues/5802 and
 https://github.com/whatwg/html/pull/10124.

 Experimental support for the Direct Sockets API in Service Workers.
 https://github.com/WICG/direct-sockets

 Experimental support for the Direct Sockets API in Shared Workers.
 https://github.com/WICG/direct-sockets

 Switch from ellipsis to clip when a container is scrolled.
 This shipped in M146 and the flag can be removed in M148.

 Disables removeFormat command on Plaintext-only content editable div

 Disconnected <area> elements should not trigger navigation.
 This was added in M146, and can be removed in M148.

 For readonly inputs, do not allow access to the picker.
 This landed in M146 and can be removed in M148.

 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.

 Dispatch selectionchange event per element according to the new spec:
 https://w3c.github.io/selection-api/#selectionchange-event

 Allowing elements with display:contents to have focus.
 See https://crbug.com/1366037

 https://chromestatus.com/feature/5067126381215744

 Enables DocumentIsolationPolicy.
 See https://https://github.com/WICG/document-isolation-policy.

 Fix iframe unload events not firing during document.open()
 https://crbug.com/40947017
 Lands in M144; remove this flag in M146 after the milestone rolls.

 https://chromestatus.com/feature/5111042975465472
 <template patchfor> etc.

 Enables preferInitialWindowPlacement Document PiP option to skip
 re-using the previous pip window bounds.

 Enables propagating user activation from a document picture-in-picture
 window up to its opener window and vice versa.

 Enables the ability to use Document Policy header to control feature
 DocumentDomain.

 Enables the ability to use Document Policy header to control feature
 ExpectNoLinkedResources.

 Enables the ability to use Document Policy header to control feature
 IncludeJSCallStacksInCrashReports. https://chromestatus.com/feature/4731248572628992

 Enables Document Policy for DedicatedWorkers.

 Enables the ability to use Document Policy header to control feature
 NetworkEfficiencyGuardrails. https://chromestatus.com/feature/5156240166223872

 Enables the ability to use Document Policy header to control feature
 SyncXHR.

 DOMActivate event inherits bubbles from the underlying event to
 prevent activation behavior of parent elements when it doesn't bubble.
 crbug.com/41431966

 When enabled, retarget the relatedTarget attribute of drag events.
 This landed in M146 and can be removed in M148.

 See https://crbug.com/443612843

 See https://crbug.com/379170477

 Enables proper backspace handling for emoji tag sequences
 (e.g., subdivision flags like 🏴󠁧󠁢󠁥󠁮󠁧󠁿) per UTS #51 ED-14a.

 ElementInternals.behaviors allows web authors to attach
 platform-provided behaviors to custom elements, enabling
 them to adopt native behaviors without extending native
 elements.
 crbug.com/486928684
 https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/PlatformProvidedBehaviors/explainer.md

 When enabled, the readonly attribute will prevent constraint validation
 only in some cases, depending on the element.
 This was added in M147 and can be removed after M149.
 https://issues.chromium.org/issues/486228104

 crbug.com/420857717

 See: crbug.com/40771555

 When enabled, the LCP algorithm ignores image entropy for the first
 video frame. See crbug.com/434659232.

 event.pseudoTarget property to represent pseudo-elements in events. Returns CSSPseudoElement or null.

 Kill-switch for https://chromestatus.com/feature/5153386492198912
 Added in M144, can be removed in M146.

 https://drafts.csswg.org/web-animations-2/#triggers

 Kill-switch for crbug.com/40434449.
 Added in M139, and it can be removed in M141.

 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.

 Add Request.bytes() and Response.bytes()
 https://chromestatus.com/feature/5239268180754432

 The Blink runtime-enabled feature name for the API's IDL.
 https://chromestatus.com/feature/4654499737632768

 The retry ability for Fetch keepalive requests.
 https://chromestatus.com/feature/5181984581877760

 Also enabled when blink::features::kFileHandlingAPI is overridden
 on the command line (or via chrome://flags).

 Shared objects by OPFS and non-OPFS File System Access API.

 In-development features for the File System Access API.

 The FileSystemHandle.getCloudIdentifiers() method (see
 crbug.com/1443354).

 Non-OPFS File System Access API.

 OPFS File System Access API.

 When enabled, calling remove() on a FileSystemAccessHandle will also
 update the permission grants for the associated path. Restored after
 next write to the path.
 See crbug.com/421690393.

 Controls the internal write-only mode for various FileSystemAccess API.
 This covers mostly content layer and does not expose any write mode to
 user visible APIs.
 This flag is part of crbug.com/421690393 and crbug.com/328458680.

 The FileSystemObserver interface for the File System Access API.
 See https://crbug.com/1019297.

 The unobserve function of the FileSystemObserver.
 See https://crbug.com/321980469.

 Adds the filter attribute to the input element, which targets a
 listbox select element to perform filtering.

 Fix for https://crbug.com/41153707

 Enables the beforefilter event and the option.filtered IDL, which are
 shared primitives needed by both the FilterableSelect and
 CustomizableCombobox features.

 When enabled, HTMLFormControlElement::IsReadOnly() returns false for
 types that don't support readonly.

 Returns alignment value instead of a boolean

 Fix a bug in the <map> element's caching of the name attribute. This
 flag was added in M148, and can be removed in M150.

 This fixes the suppression of markers for <details> and
 list items for appearance:auto.
 This was added in M146 and can be removed after M148.
 Note that as-is, this flag triggers crbug.com/408002786.

 crbug.com/411739501

 Fix for strikethrough toggle not working in empty
 contenteditable. See https://crbug.com/427915243

 Enables deal support within auctions.

 Enables using a 'deprecatedRenderURLReplacements' field within the
 Protected Audience ad auction config.

 Feature flag to control removal, in case we run into unexpected
 breakage.

 TODO(crbug.com/384481095): Remove in a few milestones, along with the
 implementation code.

 Enables the private model training API in Protected Audience.
 https://github.com/WICG/turtledove/blob/main/PA_private_model_training.md

 Enables real time reporting API in Protected Audience.
 https://github.com/WICG/turtledove/blob/main/PA_real_time_monitoring.md

 Enables the ability to set seller nonces on the header response and
 use bidNonce in bids.

 Enables having executionMode in the auctionConfig to use for seller scripts.

 https://open-ui.org/components/scoped-focusgroup.explainer/

 2-D grid navigation functionality of focusgroup is considered out of
 scope for the initial implementation.
 crbug.com/445992558

 crbug.com/40398871

 crbug.com/41170551

 crbug.com/393391746

 crbug.com/40398871

 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.

 https://github.com/flackr/reduce-motion/blob/main/explainer.md

 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.

 Generate layout fragments for out-of-flow positioned elements as
 children of their actual containing block - ALSO when inside block
 fragmentation, such as multicol. See crbug.com/40267498

 Tracking bug for the implementation: https://crbug.com/430204832

 A feature flag that controls whether the geometry mapper singular
 transform fix is enabled.
 https://issues.chromium.org/issues/441128445

 GeometryUtils mixin.
 https://drafts.csswg.org/cssom-view/#the-geometryutils-interface

 GeometryUtils for CSSPseudoElement interface.
 https://www.w3.org/TR/cssom-view-1/#the-geometryutils-interface

 When a Web application calls getDisplayMedia() and asks for audio,
 allow a hint to be provided as to whether the Web application is
 interested in audio being among the options offered to the user
 on window display surfaces.

 https://www.w3.org/TR/screen-capture/#dom-displaymediastreamoptions-windowaudio

 To filter only elements in the HTML namespace when calling
 getElementsByName().
 This was added in M141 and can be removed after M143.
 https://issues.chromium.org/issues/40502558

 Enables Skipping children for invisible select elements containing
 non-editable node while calculating end of paragraph.

 Killswitch for https://crbug.com/441547032.

 TODO(crbug.com/333628468): Enables the headingoffset and
 headingreset attributes, which allow for alternate styles of building
 structured headings. This is being actively prototyped, starting ~M136.
 For more see https://github.com/whatwg/html/issues/5033

 Kill switch for setting display: none on the media controls
 container when it is not needed.
 Lands in M147 and can be removed in M149. https://crbug.com/40591804

 Removed status stable due to https://crbug.com/456164629.

 Use container_transform_state instead of local_transform_state when
 computing z-depth for depth ordering in preserve-3d hit testing.
 Fixes incorrect hit-test results for layers without CSS transforms.
 https://crbug.com/464173566

 Extra steps in HTML Agency Adoption algorithm to remove elements from the
 formatting list when the internal loop reached the maximum number of
 iterations. This shipped in M148 and the flag can be removed in M150.

 Additional default command/commandfor actions that aren't part of v1 of
 commands. When this flag is disabled only v1 actions (popover and dialog
 defaults) will work.

 Remove support for the <command> element from the HTML parsing logic.
 This shipped in M148 and the flag can be removed in M150.
 https://issues.chromium.org/issues/491158089
 NOTE: when this flag is removed, be sure to also remove "command"
 from third_party/blink/renderer/core/html/html_tag_names.json5.

 Adds support for scroll commands such as 'page-up' and 'page-block-end'.
 https://github.com/danielsakhapov/declarative-scroll-commands-for-html-explainer

 Return a natural width/height of zero from
 HTMLImageElement.naturalWidth/Height for SVG images that don't have a
 natural width/height set.

 Adds support for the interestfor attribute. See crbug.com/326681249.
 https://open-ui.org/components/interest-invokers.explainer/
 This shipped in M142 and the flag can be removed in M144.

 Adds support for the ::interest-hint pseudo element, which is a sub-
 feature of the HTMLInterestForAttribute feature.
 https://open-ui.org/components/interest-invokers.explainer/

 Prevents the HTMLLinkElement processing model from being invoked when
 attributes are processed but their value doesn't change. See
 https://crbug.com/41436016.

 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.

 When enabled, specifies visual affordances for printing such as headers,
 footers and page numbers, to be PDF annotations.
 See section 14.8.2.2.1 here for info:
 https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf

 Parse processing instructions in HTML.

 Srcset images respond to viewport/zoom changes by
 re-selecting the best candidate, including for
 x-descriptors.
 https://crbug.com/41385706

 Improved retargeting behavior of ToggleEvent.source and
 CommandEvent.source to match Event.relatedTarget.
 crbug.com/420639769
 Enabled in M142, can be removed in M144.

 If a painting bug no longer reproduces with this feature enabled, then
 the bug is caused by incorrect cull rects.

 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.

 Enable DataTransfer propagation to input events for insertFromPaste,
 insertFromDrop, and insertReplacementText operations on content-editables.

 When enabled, deletion commands like Ctrl+Backspace (deleteWordBackward)
 with selected text will correctly report deleteContentBackward instead of
 deleteWordBackward in both beforeinput and input events, conforming to
 the W3C Input Events spec.

 The HTML parser inserts a </select> end tag before inserting <input>
 when parsing inside of a <select> tag. We want to allow <input> inside
 <select>, but it isn't web compatible enough. This flag allows <input>
 inside <select> but only if there is another open tag in between the
 <input> and the <select>, like <select><div><input>.
 For now, this flag also makes <input> close <select> like it used to
 when the <input> is put directly within an <option> or <optgroup>.

 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

 https://chromestatus.com/feature/5152834368700416

 Adds !important to [inert] {interactivity: auto} in the UA
 stylesheet. Resolved in the CSSWG here:
 https://github.com/w3c/csswg-drafts/issues/12049#issuecomment-3303716541
 This killswitch is shipping in M142, and can ge removed in M144.

 If enabled, BeginMainFrame will always be requested when there are
 active IntersectionObservers and also active composited animations.

 Fixes a bug after find-in-page tries to return focus to
 the page. This change shipped in M142, and this flag can
 be removed in M144.

 Adds encryptionScheme field based on
 https://www.w3.org/TR/media-capabilities/#keysystemtrackconfiguration.
 See https://crbug.com/498284510 for more details.

 Checks interactive content using EventPath captured at
 dispatch start instead of current DOM state. This was
 added in M145 and can be removed after M147.
 https://issues.chromium.org/issues/452084024

 When enabled, brings chromium into compliance with the resolution of:
   https://github.com/whatwg/html/issues/10671
 This flag can be used to easily revert to the old behavior if the new
 behavior causes breakage; otherwise, it can be removed after M145
 reaches stable.

 Enables the loading attribute for video and audio elements,
 allowing lazy loading similar to images.
 https://crbug.com/469111735

 Allow triggering the word suggestion from left click.
 From crbug.com/433209485

 Makes light dismiss for popovers and dialogs use the click event
 instead of pointerdown and pointerup in order to fix light dismiss
 bugs for touch inputs.
 https://issues.chromium.org/issues/408010435

 Improves the logic for removing focus from a currently focused <a>
 element when its href attribute is removed by considering other ways
 that an <a> may be focusable. Shipped in M142, should be safe to
 remove in M144.
 https://issues.chromium.org/issues/443585794

 Reverse origin trial allowing Local Network Access requests on
 non-secure contexts (but still requiring a permission grant from the
 user).

 When the start-of-line position cannot be determined (e.g., because
 the caret is in an empty inline element with no layout information),
 fall back to the start of the enclosing block rather than the start
 of the entire editable root. See https://crbug.com/41053053.

 Enable sourceCharPosition for the invoke-type resolve-promise
 https://issues.chromium.org/issues/381529126

 Enable retrieving sourceLine and sourceColumn in LoAF implementation.
 https://issues.chromium.org/issues/391417815

 Add sourceLine and sourceColumn to PerformanceScriptTiming
 https://issues.chromium.org/issues/391417815

 Add styleDuration and layoutDuration to
 PerformanceLongAnimationFrameTiming and forcedStyleDuration and
 forcedLayoutDuration to PerformanceScriptTiming

 Long press on a link selects the link text instead of bringing up
 context menu. Enabled only on Android AuthView.

 Use LongAnimationFrameMonitor to emit longtask entries

 Enables macOS system-level clipboard permission checking using
 NSPasteboard.accessBehavior API (available on macOS 15.4+).
 This allows web applications to respect user's clipboard privacy
 settings in System Settings > Privacy & Security > Clipboard.

 CSS margin-trim property: https://drafts.csswg.org/css-box-4/#margin-trim

 Enables mirroring for stretchy and large MathML operators when
 the text direction is right to left.

 Enables MathML ancestor context preservation during copy-paste
 serialization. When enabled, copying partial MathML content includes
 the containing <math> element to preserve semantic context and
 namespace declarations.

 Enables skipping <mtr> wrapping during ancestor wrapping in
 serialization. When enabled duplicate <mtr> wrapping are absent.

 Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.

 This feature helps to add memory consumer to NGShapeCache, so that
 the cached shape results would be cleared once exceeding the memory limit.

 This is enabled by default on Windows only. The only part that's
 "experimental" is the support on other platforms.

 Killswitch for crbug.com/40062462 fix.

 ModulePreloadReferrer enables modulepreload to send proper referrer
 headers as specified in the HTML spec. Behind a flag for safer rollout.
 https://crbug.com/441933555

 https://crbug.com/466888680

 MojoJSTest is used exclusively in testing environments, whereas MojoJS
 may also be used elsewhere.

 Move the selection to the last position in the list item. See
 https://crbug.com/331841851

 https://chromestatus.com/feature/5054329641893888
 streamHTML, appendHTML, etc.

 This is a killswitch flag, shipped in M144. It can be removed in M146.

 Fix for https://crbug.com/482862753

 This turns off all font antialiasing for tests unless it is
 explicitly required and enabled using the
 "--enable-font-antialiasing" flag like in the case of
 "virtual/text-antialias/" virtual test suite.
 crbug.com/339041663

 Doesn't insert empty blockquotes on outdenting a blockquote. See
 https://crbug.com/323960902

 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

 Converts mid-word U+00A0 (NBSP) to a regular space on paste and drop.
 This will be shipped in M148, and it can be removed in M150.
 See https://issues.chromium.org/issues/444065314.

 NotificationContentImage is not available in all platforms
 The Notification Center on Mac OS X does not support content images.

 Kill switch for a fix to offset-path transform invalidation for
 https://crbug.com/463409688.

 The OpaqueRange interface provides a live AbstractRange subtype
 for encapsulated content within <textarea> and <input> elements.
 crbug.com/421421332

 Restrict popover invoker lookup to the same TreeScope as the element.
 This will be shipped in M142, and it can be removed in M144.
 See https://issues.chromium.org/issues/443031270.

 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.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 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.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 Improves the performance of the global overlay:none!important UA style
 rule by replacing the normal UA style rule with other things which
 result in the same behavior. Added in M147, should be safe to remove
 in M150.

 Enables the CSS overlay property. When this flag is disabled, top
 layer exit animations will work without the need for using the overlay
 property.

 https://chromestatus.com/feature/5261280285949952

 Enable PaintOffsetTranslation for all composited LayoutObjects.
 Killswitch M148.

 PARAKEET ad serving runtime flag/JS API.

 This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.

 https://chromestatus.com/feature/5198846820352000

 PaymentRequest is enabled by default on Android

 Sends custom user timing events in subframes to the browser process.
 crbug.com/467177770 for more details.

 Enables performance.mark('mark_feature_usage'): crbug.com/1517170

 crbug.com/398955086

 This is a reverse OT used for a phased deprecation.
 https://crbug.com/918374

 Flag for enabling the pointer lock API on Android

 https://crbug.com/404479704

 Kill switch for https://crbug.com/448173938 which changes position
 visibility to ignore non-clipping ancestors.

 Adds a web setting to disable CSS ScrollbarColor, ScrollbarWidth, and
 legacy ::-webkit-scrollbar* pseudo-element styling.

 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.

 Used to allow preloading data: URLs with link rel=preload.
 https://crbug.com/348442535

 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.

 Used to allow prerender cross-origin iframes with an opt-in response
 header.
 https://chromestatus.com/feature/5112398709129216
 https://crbug.com/440387014

 Used to allow prerender activation by form submission.
 See https://crbug.com/346555939.

 When enabled, preserves dropEffect in drag event set during dragover
 events. See https://crbug.com/434151262

 When enabled, prevents undo to be applied if the enclosing block
 is not editable

 Controls the aggregate error reporting feature, which allows for
 contributions to be made conditional on error conditions that can be
 hit when using the API. This also defers contribution merging and
 modifies the budgeting flow.
 https://chromestatus.com/feature/5194896325214208

 Controls whether Private Aggregation's "maxContributions" field is
 enabled for Shared Storage callers. If disabled, the field will be
 ignored. https://chromestatus.com/feature/5189366316793856

 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.

 When enabled, dedicated workers can use profiler API

 Promisify programmatic scroll methods in Element and Window.
 https://crbug.com/41406914

 When enabled, setting progress.max enforces a >0 constraint.
 This will be shipped in M146, and it can be removed in M148.

 Propagate overscroll-behavior from the root element rather than the
 body element. crbug.com/41453796

 Protected memory varariant of the sample API for testing integration with
 the Origin Trials Framework. This is used only in unit tests.
 Do not change this flag to stable, as it exists
 solely to generate code used by the sample API implementation.

 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.

 As above. Do not change this flag to stable, as it exists solely to
 generate code used by the origin trials sample API implementation.

 Allowing pseudo-elements to have focus.

 Support hit-testing for ::after, ::before, ::marker
 (e.g. for CSSPseudoElement).

 Support :hover on ::after, ::before, ::marker.

 ChromeStatus: https://chromestatus.com/feature/6194847180128256

 Enables support for a 'min' option in ReadableStream BYOBReader.read(),
 allowing callers to specify the minimum number of bytes to be read into
 the buffer before resolving the read request.
 https://chromestatus.com/feature/6396991665602560

 getType() on a ClipboardItem triggers the
 clipboard read operation, implementing lazy loading for clipboard data.

 Enables correct reading-flow ordering when slots are involved.
 This will be shipped in M148, and it can be removed in M150.
 See https://issues.chromium.org/issues/452981723.

 Shipping in M148, so should be removed around M150.

 If enabled, both Accept-Language HTTP header and JavaScript getter will
 be reduced.

 If enabled, the platform version in User-Agent Data will be removed.
 This feature is limited to Linux only.

 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.

 This feature acts as a kill switch for ISO-2022-JP auto-detection.
 This will be shipped in M139, and it can be removed in M141.
 See https://chromestatus.com/feature/6576566521561088.

 After paste operation removes the placeholder <br> tag
 that gets inserted in contenteditable as placeholder for newline

 Fix for removeFormat command incorrectly preserving background-color
 when removing styles from elements. Prevents background-color from being
 re-applied to child elements during style removal.
 See https://crbug.com/41438799

 Remove non-allowlisted event interfaces from document.createEvent().
 This was added in M148 and can be removed after M150.
 https://chromestatus.com/feature/5095987863486464
 https://issues.chromium.org/issues/41228793

 See https://issues.chromium.org/issues/40779139

 See https://issues.chromium.org/issues/41474791

 See https://issues.chromium.org/issues/41311101

 See https://github.com/whatwg/html/issues/11070
 ChromeStatus: https://chromestatus.com/feature/5207202081800192

 The renderpriority attribute feature.
 https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md

 If enabled, makes the root scrollbars' foreground elements follow the
 browser

 Route matching, @route CSS rule, script type="routemap".
 https://chromestatus.com/feature/4771962874363904

 Enables the use of jitterBufferTarget attribute in WebRTC.
 Spec: https://w3c.github.io/webrtc-extensions/#dom-rtcrtpreceiver-jitterbuffertarget

 Legacy callback-based getStats() has limited availability unless this
 Deprecation Trial is enabled.
 TODO(https://crbug.com/822696): Remove when origin trial ends.

 Enables the use of |RTCRtpEncodingParameters.codec|

 Enables the use of SVC scalability mode in WebRTC.
 Spec: https://w3c.github.io/webrtc-svc/

 Runs a microtask checkpoint before prepare script in
 XML Parser. This was added in M148 and can be removed
 after M150.
 https://issues.chromium.org/issues/439639184

 HTML event loop invoking 'Run snapshot post-layout state steps' from
 the CSSOM View per spec proposal.

 Spec: https://wicg.github.io/sanitizer-api/
 Tracking bug: crbug.com/356601280

 https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries
 https://github.com/whatwg/html/issues/10854
 Spec PRs:
 https://github.com/whatwg/html/pull/10869
 https://github.com/whatwg/dom/pull/1341

 https://github.com/WICG/view-transitions/blob/main/scoped-transitions.md

 https://github.com/w3c/window-management/issues/149

 crbug.com/406917902

 WebSpeech API with both speech recognition and synthesis functionality
 is not fully enabled on all platforms.

 Use parent element for text node to compute relative offset when
 serializing scroll anchor to ensure consistency with
 ComputeUniqueSelector()

 TODO(355460994): Remove after M129.
 scroll into root frame didn't take scrollbar and borders into account,
 while this is fixed, to avoid any web compat issues we have this killswitch.

 Separate flag for crbug.com/1426506 (getCurrentTime API change) which
 is expected to land after the initial launch of ScrollTimeline.

 https://github.com/w3c/csswg-drafts/issues/9367#issuecomment-1854280461

 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.

 Only consider unique case-insensitive scroll-to-text fragments.

 Allows CSS styling of browser search results.
 https://issues.chromium.org/issues/339298411
 https://chromestatus.com/feature/5195073796177920

 SecurePaymentConfirmation has shipped on some platforms, but its
 availability is controlled by the browser process (via the
 SecurePaymentConfirmationBrowser feature), as it requires browser
 support to function. See //content/public/common/content_features.cc

 The status is set to 'test' here to enable some WPT tests that only
 require blink-side support to function.

 SecurePaymentConfirmationAvailabilityAPI needs to be kept as a runtime
 flag in order to disable the API in WebView.

 SelectAudioOutput API
 https://chromestatus.com/feature/5164535504437248

 The selectedcontentelement attribute is for connecting select elements
 to arbitrary <selectedcontent> elements.
 https://github.com/openui/open-ui/issues/1063
 https://github.com/whatwg/html/issues/12227

 Aligns the implementation of the <selectedcontent> element with the
 HTML spec. https://issues.chromium.org/issues/458113204

 See https://crbug.com/40664519
 Disabled due to UI freeze issues, see https://crbug.com/448833953.

 Fixes selection focus affinity at soft wrap boundaries. When the focus
 of a range selection is at a soft wrap boundary (a DOM offset shared by
 two visual lines), this ensures the correct affinity is used based on
 the selection direction.
 See https://crbug.com/40980028

 Killswitch M141.

 https://issues.chromium.org/issues/40502558

 https://issues.chromium.org/issues/40502558

 Enables skipping user-select: none content
 in DOMSelection::toString()

 Conditionally update selection only when autoscroll actually scrolls.
 This prevents infinite selection updates during autoscroll when the
 scroll position doesn't change.
 See https://crbug.com/412578722

 See https://crbug.com/395544401

 See https://chromestatus.com/feature/5203433409871872

 See https://chromestatus.com/feature/4811835974615040

 Removes the forced overflow:hidden rules on the select element's
 InnerElement unless the author specifies text-overflow:ellipsis. May
 cause text to overlap with the dropdown indicator.
 https://issues.chromium.org/issues/40805967

 SlotChange signal is sent after node insertion is complete,
 ensuring that slot fallback content is handled correctly.
 This was added in M145 and can be removed after M147.
 https://issues.chromium.org/issues/40150299

 Separate defer and module script execution into individual tasks
 to comply with HTML spec requirement to "spin the event loop" between
 each script execution. This prevents long tasks and improves responsiveness.
 https://crbug.com/40894694

 Support for Service Worker background sync APIs in Dedicated Workers.
 See https://chromestatus.com/feature/6497653025931264
 See https://issues.chromium.org/issues/40364838

 Support for Service Worker APIs in Dedicated Workers.
 See https://chromestatus.com/feature/6497653025931264
 See https://issues.chromium.org/issues/40364838

 When enabled, sets the default drop effect as according to spec for
 events like dragOver, dragLeave, etc. See https://crbug.com/434151262

 https://chromestatus.com/feature/5176753681203200

 https://crbug.com/448174611

 Reference Target allows IDREF attributes to refer inside Shadow DOM.
 crbug.com/346835896

 If enabled, Reference Target will support aria-owns.
 https://github.com/WICG/webcomponents/issues/1091

 If enabled, SharedWorker supports extendedLifetime
 https://github.com/whatwg/html/issues/10997
 https://issues.chromium.org/issues/400473072

 If enabled, only call ResourceLoadObserver callbacks if the DevTools
 panel is open.

 Improves performance of event dispatching by skipping the capture
 phase if there are no capture listeners registered on the page.

 When enabled, cursor movement (arrow keys) will skip over non-editable
 atomic or empty inline elements within editable content, instead of
 getting stuck or moving into the non-editable content.

 Skips paragraph split in insertHTML when the fragment contains only
 inline content, preventing inline elements from being inserted
 outside their containing block.
 See https://crbug.com/41024699.

 Skip lines that contain only pseudo-element content (like ::before
 or ::after) when determining valid caret positions for line
 navigation. Pseudo-elements don't have DOM nodes for caret positioning,
 so including them caused incorrect selection behavior.
 See crbug.com/357889508

 Skips the browser touch event filter, ensuring that events that reach
 the queue and would otherwise be filtered out will instead be passed
 onto the renderer compositor process as long as the page hasn't timed
 out. If skip_filtering_process is browser_and_renderer, also skip the
 renderer cc touch event filter, ensuring that events will be passed
 onto the renderer main thread.

 Fix for crbug.com/41393366

 See crbug.com/446113738.

 Snapshot scroll-timelines post layout only. See
 RunSnapshotPostLayoutStateSteps flag.

 Used to enable the code for detecting soft navigations through task
 attribution. Set to stable as this generates an enabled-by-default
 base::Feature for a field-trial remote shutoff. Needs to be a runtime
 feature so that the Soft Navigation Heuristics Origin Trial can depend
 on it.

 Source-specific multicast support in the Direct Sockets API.

 Whether spatial navigation should use cursor inheritance to exclude
 nodes where cursor is inherited. Kill-switch that can be remove once
 the change goes through a stable release.

 This is a flag that re-enables some deprecated/removed "special rules"
 that apply to the styles of an <h1> element nested within <article>,
 <aside>, <nav>, or <section>. It is disabled by default, and here as a
 Finch killswitch only. This was shipped (disabled) in M140, and the flag
 can be removed in M142.

 API for accessing the Custom Dictionary for spell checking purpose.
 https://chromestatus.com/feature/6185007701557248

 Kill switch for change to unify image-set and srcset selection logic.

 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.

 Kill switch for falsifying IsStacked() for non-stacked
 stacking contexts. https://crbug.com/40208685

 See https://github.com/w3c/csswg-drafts/issues/9398

 Preserves the sticky user activation state after a page navigates to
 another same-origin page. https://crbug.com/433729626

 Gates the durability() method on a storage bucket and the property in
 the options struct.

 Gates the locks() method on a storage bucket.

 Performs sanitization while parsing instead of post-processing a parsed
 fragment. https://crbug.com/498272014

 'pointercancel' and boundary leave ('pointerout' and 'pointerleave')
 events would now fire after a mouse drag start, matching the spec's
 definition of "pointer stream suppression". See:
 https://github.com/w3c/pointerevents/issues/555

 Treat SVG documents in <object>/<embed> as replaced elements
 https://issues.chromium.org/41302806

 This is used for emoji variation selectors support in system
 fallback matching. This is a workaround solution that helps to
 avoid incorrect font matching due to lack of cmap format 14
 subtable in system emoji fonts on various platforms.
 This should be eventually removed when the custom emoji font
 is shipped with Chrome or when system emoji fonts will have
 cmap format 14 subtable.

 Don't trigger table border rendering with only bordercolor attribute.
 This shipped in M146 and can be removed in M148.

 Remove <table>'s explicit border-color: gray UA stylesheet rule,
 since it is non-standard. See crbug.com/494554835.

 When checking the shadow tree during invoke(),
 use the invocationTargetInShadowTree saved before
 calling the listener.
 This was added in M142 and can be removed after M147.
 https://issues.chromium.org/issues/41408360

 For unit tests.
 This is for testing copied_from_base_feature_if.
 This is set in base/test/test_suite.cc.

 For unit tests.

 This is a feature used for testing what happens when an origin trial
 feature has browser-process read/write access. It should never be used
 in production code.

 For unit tests.

 For unit tests.

 For unit tests.

 For unit tests.

 For unit tests.

 crbug.com/40812040

 crbug.com/368657256

 crbug.com/442481227

 When enabled, text-overflow ellipsis is clipped when
 selection focus is inside the element, revealing the full text content.
 See https://crbug.com/40731275

 https://crbug.com/41492459

 crbug.com/431660829

 crbug.com/431660829

 crbug.com/440947112

 crbug.com/331123676

 https://drafts.csswg.org/web-animations-2/#triggers

 This feature allows calling the Topics API via an image
 attribute.

 This feature allows touch dragging and a context menu to occur
 simultaneously, with the assumption that the menu is non-modal.  Without
 this feature, a long-press touch gesture can start either a drag or a
 context-menu in Blink, not both (more precisely, a context menu is shown
 only if a drag cannot be started).
 This feature is enabled by default in Android, where
 TouchDragOnShortPress is not shipped due to interactions with the OS that
 caused issues in the behavior.
 Please see https://issues.chromium.org/40823294

 This feature enables drag and drop using touch input devices. Replaces
 the old "--enable-touch-drag-drop" and "--disable-touch-drag-drop"
 switches.
 Enabled by default in Android, ChromeOS and Windows.

 This feature makes touch dragging to occur at the short-press gesture,
 which occurs right before the long-press gesture.

 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.

 Set to reflect the kTouchTextEditingRedesign feature.

 Fixing detection of unhandled promise rejections for view-transitions
 created a spike in unhandled rejections for cross-document view
 transitions. The transition on the old document is skipped, but as the
 old document is only used to capture the snapshot, and a skip is
 imminent, the promise rejection is not indicative of unexpected behavior.
 crbug.com/496115780

 This is conditionally set if the platform supports translation.

 Traverse flat tree to find start and end of paragraph in delete
 selection to handle slot distribution in details.
 See https://crbug.com/413595949

 When enabled, treats the initial navigation to about:blank#fragment in
 an MHTML document as a cross-document navigation.

 Although it appears to be a same-document fragment navigation, MHTML
 loading replaces the initial empty document with a new committed
 document that has an opaque origin.

 This feature acts as a kill switch for https://crbug.com/40580002.

 When enabled, trusted types can be used to enforce sanitization &
 script running rules.
 For example, it can enforce that any HTML setter would go through a
 sanitizer. See https://github.com/w3c/trusted-types/issues/594

 Adapt Trusted Types to its new spec, as part of HTML.
 Tracking bug: 330516530

 This is a kill switch for the unprefixed Web Speech API.

 This is a reverse OT used for a phased deprecation, on desktop
 https://crbug.com/1071424

 Enables using policy-controlled feature "usb-unrestricted" to allow
 isolated context to access protected USB interface classes and to
 bypass the USB blocklist.

 If enabled, notify the associated DisplayCutoutHost of changes in
 complex safe area constraint usage on the page.
 Only Android may make use of this feature currently.

 Fix for https://crbug.com/436624850
 Ensures trivialtext is updated after fragment creation from text
 by calling UpdateTrivialReplacementText()

 Fix for https://crbug.com/454639396

 Android currently uses low-quality interpolation, while other platforms
 default to medium-quality. This flag is for experimenting with changing
 the value on Android. See: https://crbug.com/374315986.

 This flag uses the original DOM text for input when the password
 echo is enabled to create the offset_map.

 Stops user action pseudo-classes from propagating out of top layer
 elements. See https://crbug.com/407769114.

 Fix for https://crbug.com/421314614

 Whether a video element should automatically play fullscreen unless
 'playsinline' is set.

 Guards the removal of legacy visual rect inflation when mapping through
 nested 2D transforms. Prevents rotated or skewed descendants from being
 repeatedly expanded while computing visible bounds.

 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.

 When enabled, this will issue a warning to the console any time
 rendering is forced withing content-visibility subtrees (both
 content-visibility: auto and content-visibility: hidden).

 https://chromestatus.com/feature/5183481574850560

 This needs to be kept as a runtime flag
 in order to disable the API in WebView.

 If enabled, form controls will only render the OS accent color in a
 web app context for the initial browser profile.

 https://chromestatus.com/feature/6024844719947776

 WebAssembly JS Promise Integration,
 https://github.com/WebAssembly/js-promise-integration/blob/main/proposals/js-promise-integration

 https://chromestatus.com/feature/5077691662073856

 https://chromestatus.com/feature/5077691662073856
 Allows an Enterprise Policy to override WebAudioBypassOutputBuffering

 https://webaudio.github.io/web-audio-api/#dom-baseaudiocontext-renderquantumsize

 WebAuth is disabled on Android versions prior to N (7.0) due to lack of
 supporting APIs, see runtime_features.cc.

 When enabled adds the authenticator attachment used for registration and
 authentication to the public key credential response.

 Prototyping https://github.com/w3c/webauthn/issues/2144

 https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats

 Enables uiMode enumeration field in CredentialRequestOptions struct.
 and get() requests with uiMode: 'immediate'.
 See https://github.com/w3c/webauthn/issues/2228.

 https://w3c.github.io/webauthn/#sctn-supplemental-public-keys-extension

 WebBluetooth is enabled by default on Android, ChromeOS, iOS, macOS and
 Windows.

 Adding post-quantum algorithms (ML-DSA, ML-KEM) to WebCrypto.
 Also adding ChaCha20-Poly1305 while we're at it.

 https://chromestatus.com/feature/5198951632470016

 Draft WebGL extensions are deliberately not enabled by experimental web
 platform features.

 Switch WebGL to use an experimental implementation where WebGL calls
 are translated in Blink, via ANGLE, to WebGPU calls. Note that this
 is not marked as "experimental" because it is not an incremental
 addition like other experimental features but a code switch, so we
 don't want to enable it when testing all "experimental Web platform
 features".

 Launch feature flag for WebGPU Compatibility Mode
 https://chromestatus.com/feature/6436406437871616

 WebGPU developer features are deliberately not enabled by experimental
 web platform features.

 WebGPU experimental features are meant for features that would
 eventually land in the WebGPU spec.

 Enables GPUBuffer::mapSync for WebGPU.

 Allows handling of WebGPU related commands from the GPU process to
 happen on a separate thread. This is a pre-requisite for emulation of
 serialized asynchronous APIs, i.e. mapSync.

 It is only enabled in extension environment for now.

 Kill switch for making BigInt handling in WebIDL use ToBigInt.

 Support for form-associated custom elements in declarative
 WebMCP tools.

 https://wicg.github.io/web-preferences-api/

 WebShare is enabled by default on Android (non-WebView), Win, ChromeOS, and Mac.
 This is done in chrome/renderer/chrome_content_renderer_client.cc to prevent
 making the API available to Linux and WebView. Ideally we would set the status
 below to "stable" once we can do so without significant test expectation duplication.

 Note: enabling this without setting WebTransportCongestionControl to
 either BBRv1 or BBRv2 will produce poor bandwidth estimates.

 Fetches the WebUI code cache from the resource bundle asynchronously
 on a worker thread.

 It is only enabled in extension environment for now.

 If enabled, window.default[Ss]tatus will be supported. This is disabled
 by default, and is here to allow this behavior to be re-enabled via Finch
 in case of problems. This flag should be removed by Q1 2023, assuming
 no problems are encountered.

 Fixes an issue where Ctrl+Right Arrow skips punctuation before a newline.

 Moving to the Rust parser requires deprecation of the niche feature
 of synchronously including external entities.
 https://crbug.com/455813733

 Enables the Rust XML parser for situations where we know
 no XSLT processing will be required. This covers usage of
 JS DOMParser API to parse XML, and usage of XMLHttpRequest
 with its responseXML document.
 https://crbug.com/466303347

 Support XPath evaluation within Shadow DOM.
 This was added in M146 and can be removed after M148.

 A feature flag that controls whether XSLT is supported by the browser.
 The current default state is XSLT-enabled. Note that there is a Finch
 trial underway that sets this flag to false for pre-stable channels.
 See XSLTSpecialTrial below.
 crbug.com/435623334.

 A feature flag that will be used for a "special trial" of disabling
 XSLT on pre-stable channels only. This flag does not control the
 actual enabled state of XSLT. It merely changes the console error that
 gets emitted if XSLT is disabled. When this flag is true, a "special
 trial run" message is used.
 crbug.com/435623334.