Kill switch to guard additional security checks performed by the browser
process on opaque origins, such as when verifying source origins for
postMessage. See https://crbug.com/40109437.

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.

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.

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

When this feature is enabled, private network requests initiated from
non-secure contexts in the public address space  are blocked.

See also:
- https://wicg.github.io/private-network-access/#integration-fetch
- kBlockInsecurePrivateNetworkRequestsFromPrivate
- kBlockInsecurePrivateNetworkRequestsFromUnknown

When this feature is enabled, requests to localhost initiated from non-secure
contexts in the private IP address space are blocked.

See also:
- https://wicg.github.io/private-network-access/#integration-fetch
- kBlockInsecurePrivateNetworkRequests

Enables use of the PrivateNetworkAccessNonSecureContextsAllowed deprecation
trial. This is a necessary yet insufficient condition: documents that wish to
make use of the trial must additionally serve a valid origin trial token.

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 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.

This killswitch is distinct from the OT.
It allows us to remotely disable the feature, and get it to stop working even
on sites that are in possession of a valid token. When that happens, all API
calls gated by the killswitch will fail graceully.

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

Gate access to cookie deprecation API which allows developers to opt in
server side testing without cookies.
(See https://developer.chrome.com/en/docs/privacy-sandbox/chrome-testing)

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.

When enabled, the DevTools Privacy UI is displayed.

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 Bounce Tracking Mitigations for Dual Use sites.

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.

Enable drawing under System Bars within DisplayCutout.

Enable establishing the GPU channel early in renderer startup.

Enables canvas 2d methods BeginLayer and EndLayer.

Enables service workers on chrome-untrusted:// urls.

Enables service workers on chrome:// urls.

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.

Support usernames and phone numbers to identify users, instead of
(or in addition to) names and emails.

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

Enables cooldown on ignore in FedCM API.

Enables usage of the FedCM Delegation API.

Enables usage of the FedCM IdP Registration API.

For cross-site iframes, sends the top-level origin to the IDP and parses
an optional returned boolean indicating whether it is part of the same
client to allow for UI decisions based on the boolean.

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

Enables usage of the FedCM API with multiple identity providers at the same
time.

Enables showing filtered out accounts in FedCM UI after the user attempts to
login to an account. These accounts are shown greyed out.

Enables bypassing the well-known file enforcement.

Enables Lightweight FedCM Mode

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

See crbug.com/359623664

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

Kill switch for the GetInstalledRelatedApps API.

Allow Windows specific implementation for the GetInstalledRelatedApps API.

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 a new Automatic Fullscreen content setting that lets allowlisted
origins use the HTML Fullscreen API without transient activation.
https://chromestatus.com/feature/6218822004768768

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.

Enable lazy initialization of the media controls.

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 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).

Partitioned Popins must have a Popin-Policy in their top-frame HTTP Response
that permits the opener origin. This feature disables that check for purposes
of testing only, this must never be enabled by default in any context.
See https://explainers-by-googlers.github.io/partitioned-popins/

Enables additional ChildProcessSecurityPolicy enforcements for PDF renderer
processes, including blocking storage and cookie access for them.

TODO(https://crbug.com/40205612): Remove this kill switch once the PDF
enforcements are verified not to cause problems.

Whether web apps can run periodic tasks upon network connectivity.

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

If explicitly disabled, prefetch proxy is not used.

If enabled, browser-initiated prefetch is allowed.
Please see crbug.com/40946257 for more details.

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.

Enables Private Network Access checks for all types of web workers.

This affects initial worker script fetches, fetches initiated by workers
themselves, and service worker update fetches.

The exact checks run are the same as for other document subresources, and
depend on the state of other Private Network Access feature flags:

- kBlockInsecurePrivateNetworkRequests
- kPrivateNetworkAccessSendPreflights
- kPrivateNetworkAccessRespectPreflightResults

Enables Private Network Access checks in warning mode for all types of web
workers.

Does nothing if kPrivateNetworkAccessForWorkers is disabled.

If both this and kPrivateNetworkAccessForWorkers are enabled, then PNA
preflight requests for workers are not required to succeed. If one fails, a
warning is simply displayed in DevTools.

Enables Private Network Access checks for navigations.

The exact checks run are the same as for document subresources, and depend on
the state of other Private Network Access feature flags:
- kBlockInsecurePrivateNetworkRequests
- kPrivateNetworkAccessSendPreflights
- kPrivateNetworkAccessRespectPreflightResults

Enables Private Network Access checks in warning mode for navigations.

Does nothing if kPrivateNetworkAccessForNavigations is disabled.

If both this and kPrivateNetworkAccessForNavigations are enabled, then PNA
preflight requests for navigations are not required to succeed. If
one fails, a warning is simply displayed in DevTools.

Requires that CORS preflight requests succeed before sending private network
requests. This flag implies kPrivateNetworkAccessSendPreflights.
See: https://wicg.github.io/private-network-access/#cors-preflight

Enables sending CORS preflight requests ahead of private network requests.
See: https://wicg.github.io/private-network-access/#cors-preflight

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, queues navigations instead of cancelling the previous
navigation if the previous navigation is already waiting for commit.
See https://crbug.com/838348 and https://crbug.com/1220337.

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.

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).

Enable using the RenderDocument.

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

Set a tri-state priority on v8 isolates reflecting the renderer 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.

Reuse compositor instances with RenderDocument

Enables retrying to obtain list of available cameras after restarting the
video capture service if a previous attempt failed, which could be caused
by a service crash.

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

A feature to enable using the update token in the manifest or icon url
changes to detect app updates. When this is enabled, automatic icon
downloading is disabled.

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.

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.

Controls whether subframe process reuse should be restricted according to
resource usage policies. Namely, a process that is already consuming too
much memory is not attempted to be reused.

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).

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

Enable WebAssembly JSPI.

Enables WebAssembly Shared-Everything Threads.

Enable WebAssembly lazy compilation (JIT on first call).

Enable WebAssembly tiering (Liftoff -> TurboFan).

Enable WebAssembly trap handler.

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.
TODO(crbug.com/399911225): enable by default and remove this feature once
major sources of JS errors are fixed. Currently this is only enabled on 1%
stable and 50% non-stable.

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.

Enable the navigator.permissions API.
Used for launch in WebView, but exposed in content to map to runtime-enabled
feature.

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.

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

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

Whether to allow attaching an inner WebContents not owned by the outer

BackForwardCache is disabled on low memory devices. The threshold is defined
via a field trial param: "memory_threshold_for_back_forward_cache_in_mb"
It is compared against base::SysInfo::AmountOfPhysicalMemoryMB().

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

When this feature is enabled, private network requests initiated from
non-secure contexts in the public address space  are blocked.

Enables use of the PrivateNetworkAccessNonSecureContextsAllowed deprecation
trial. This is a necessary yet insufficient condition: documents that wish to

Broker file operations on disk cache in the Network Service.

Enables JavaScript API to intermediate federated identity requests.
Note that actual exposure of the FedCM API to web content is controlled

Support usernames and phone numbers to identify users, instead of

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

For cross-site iframes, sends the top-level origin to the IDP and parses
an optional returned boolean indicating whether it is part of the same
client to allow for UI decisions based on the boolean.

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

Enables usage of the FedCM API with multiple identity providers at the same

Enables showing filtered out accounts in FedCM UI after the user attempts to
login to an account. These accounts are shown greyed out.

This is a kill switch for focusing the RenderWidgetHostViewAndroid on
ActionDown on every touch sequence if not focused already, please see

Whether a memory pressure signal in a renderer should be forwarded to Blink

Enables additional ChildProcessSecurityPolicy enforcements for PDF renderer
processes, including blocking storage and cookie access for them.

Use code paths for prefetch/prerender integration.

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.

Enables Private Network Access checks in warning mode for all types of web
workers.

Enables Private Network Access checks in warning mode for all types of web
workers.

Does nothing if kPrivateNetworkAccessForWorkers is disabled.

If both this and kPrivateNetworkAccessForWorkers are enabled, then PNA
preflight requests for workers are not required to succeed. If one fails, a

Fires the pushsubscriptionchange event defined here:
https://w3c.github.io/push-api/#the-pushsubscriptionchange-event

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
exceptions by users is a rare event. Hence, if user has never allowed any

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

RenderDocument:

Reuses RenderProcessHost up to a certain threshold. This mode ignores the

Allows process reuse for localhost and IP based hosts when
kProcessPerSiteUpToMainFrameThreshold is enabled.

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

Supports x-on-meet-coop interop implementation.

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

Controls whether SpareRenderProcessHostManager tries to always have a warm
spare renderer process around for the most recently requested BrowserContext.

Controls whether site isolation should use origins instead of scheme and

Disallows window.{alert, prompt, confirm} if triggered inside a subframe that

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

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

Enables a CHECK in NavigationRequest::ValidateCommitOrigin() to verify

Enables V8 to use a set of experimental optimizations for Android Desktop.
This feature flag is intended to control various performance-related
tweaks.

Enable the navigator.permissions API.
Used for launch in WebView, but exposed in content to map to runtime-enabled
feature.

Enables posting registering, unregistering the broadcast receiver to the
background thread.

Disables WebAuthn on Android Auto. Default enabled in M137, remove in or
after M140.

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

namespace features

 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.

 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

 Extension access to "AIPromptAPI".

 An OT feature name is required to satisfy implied_by build checks.
 The feature reuses AIPromptAPIMultimodalInput, but any origin trial
 features in the implied_by list will enable this feature as well.

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

 Fix for https://crbug.com/41238177.

 https://crbug.com/40681200

 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

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

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

 there is no need to collapse the whitespace between them.
 https://crbug.com/406053617

 When enabled, clicking on canvas element will not update the selection.
 See crbug.com/40130450.

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

 Used to enable Blink side of features flags for Default Nav Transition.

 A developer opt-out for background page freezing.

 crbug.com/1147998: Mouse and Pointer boundary event dispatch (i.e. dispatch
 of enter, leave, over, out events) tracks DOM node removal to fix event
 pairing on ancestor nodes.

 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.

 https://github.com/WICG/html-in-canvas/blob/main/README.md

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

 https://crbug.com/394052224

 No status because this blink runtime feature doesn't work by itself.
 It's controlled by the corresponding Chromium feature,
 fingerprinting_protection_interventions::features::kCanvasNoise through
 modified_runtime_features and setting its status in the browser
 process.

 crbug.com/389726691.

 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

 https://www.w3.org/TR/cssom-view-1/#dom-document-caretpositionfrompoint

 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

 This flag shifts the timing of clearing the popover invoker so that it
 happens after the beforetoggle event is fired. This is something of a
 bug fix: see the spec discussion at
 https://github.com/whatwg/html/issues/11246#issuecomment-2860876897.
 This is enabled by default, and is a kill switch. It shipped in M138,
 and can be removed in M140.

 Allows top-level sites to restrict collection of high-entropy UA client
 hints (from 3Ps, or itself) via the getHighEntropyValues API.
 crbug.com/385161047

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

 Enables the API for getting a unique token of the system clipboard's
 current state.
 https://chromestatus.com/feature/5124993439236096

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

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

 Enables the ability to reset the clipboard snapshot when clipboard write
 operations are performed. This feature ensures that stale clipboard data
 is cleared and a fresh snapshot is created when necessary.
 See crbug.com/388081043

 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

 Killswitch for https://crbug.com/414827239

 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.

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

 Allow WebAuthn relying parties to report information about existing
 credentials back to credential storage providers.
 Enabled by default on M132. Remove flag on or after M135.

 The AccentColor And AccentColorText CSS system color keywords

 CSS attr() function that accepts not only string types
 and can be used in all properties.
 https://drafts.csswg.org/css-values-5/#attr-notation

 Enables alignment properties for block and inline out-of-flow elements.

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

 Support for the anchor-scope property.
 https://drafts.csswg.org/css-anchor-position-1/#anchor-scope

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

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

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

 Replaces string type in CSS attr() function syntax with raw-string.
 https://github.com/w3c/csswg-drafts/issues/11645#issuecomment-2701601350

 https://chromestatus.com/feature/5125388091260928

 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

 Need a feature entry

 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://github.com/w3c/csswg-drafts/issues/8376#issuecomment-2751161553

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

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

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

 Allows getComputedStyle() and similar to get information about :visited colors.
 Only safe if PartitionVisitedLinkDatabaseWithSelfLinks is enabled.

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

 crbug.com/417306102

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

 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

 Support making elements inert through the interactivity property.

 CSS if() function for custom properties. Flag is used only for media
 queries support in conditions.
 https://drafts.csswg.org/css-values-5/#if-notation.

 CSS if() function for custom properties. Flag is used only for style
 queries support in conditions.
 https://drafts.csswg.org/css-values-5/#if-notation.

 CSS if() function for custom properties. Flag is used only for supports
 queries support in conditions.
 https://drafts.csswg.org/css-values-5/#if-notation.

 Support for the interest-delay shorthand property.
 The longhands are controlled by HTMLInterestForAttribute. The
 shorthand is controlled separately since shorthands can not be enabled
 by an origin trial.

 https://chromestatus.com/feature/6289894144212992

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

 Kill switch for crbug.com/378966977

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

 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

 Enables the :open pseudo-selector.
 https://chromestatus.com/feature/5085419215781888

 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

 TODO(crbug.com/40932006): CSS 'reading-flow' property for reading order
 of grid, flexbox and block items.
 https://drafts.csswg.org/css-display-4/#reading-flow
 This should ship in M137, and it can be removed after M139.

 TODO(crbug.com/393550130): CSS 'reading-order' property to overwrite
 reading-flow order.
 https://drafts.csswg.org/css-display-4/#reading-order
 This should ship in M137, and it can be removed after M139.

 crbug.com/359616070

 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.

 Enables env(safe-area-max-inset-*).
 https://github.com/w3c/csswg-drafts/issues/11019

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

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

 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

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

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

 Ignore cycles in unused var()/attr() fallbacks.

 sibling-index() and sibling-count()

 Allow sibling-index() and sibling-count() in @container queries

 Explainer: https://drafts.csswg.org/css-values/#round-func

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

 crbug.com/1463890: CSS text-autospace property

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

 crbug.com/41442840: Enabled by default on M139, remove after M141.

 Support for tree-scoped [1] timeline names (e.g. produced by
 scroll-timeline).

 [1] https://drafts.csswg.org/css-scoping-1/#shadow-names

 The var() fallback does not validate against the type
 of the custom property being referenced.

 Support for user-select:contain.

 https://chromestatus.com/feature/4850737974345728

 Adds the appearance:base-select CSS value which makes <select>
 rendering using alternate content in the UA shadowroot which is
 customizable.

 appearance:base-select for <select multiple> and <select size=n>
 https://issues.chromium.org/issues/357649033

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

 Replaces \r\n and \r with \n in setCustomValidity.
 https://github.com/whatwg/html/pull/10350
 https://issues.chromium.org/issues/340814283

 https://chromestatus.com/feature/5134293578285056

 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.

 Prevents <form method=dialog> from submitting across shadow boundaries
 when looking for an ancestor <dialog> element.
 https://issues.chromium.org/issues/40229445

 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

 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

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

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

 Dynamically change the safe area insets based on the bottom browser
 controls visibility.

 Dynamically change the safe area insets as browser controls scrolls.

 crbug.com/341564372

 crbug.com/341564372

 crbug.com/40118302

 See: crbug.com/40771555

 Escapes "<" and ">" in attribute values. This was launched
 in M138, and this flag can be removed in M140.
 See: crbug.com/1175016

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

 crbug.com/414112253

 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

 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.

 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.

 crbug.com/411739501

 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.

 Don't create LayoutMultiColumnFlowThread objects, or any of the other
 legacy multicol objects.

 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.

 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

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

 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

 Adds color:gray to the <hr> element in the UA stylesheet.
 https://issues.chromium.org/issues/425113244

 The anchor attribute, supported by both anchor positioning and the
 popover API.

 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.

 Adds support for the 'request-close' command.
 https://open-ui.org/components/invokers.explainer/

 The <embed> should follow the specification, layout is not forced
 when the type attribute is set to image.
 https://html.spec.whatwg.org/C/#the-embed-element
 This feature was shipped in M131, so this flag can be removed in M133.

 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 experimental interestfor
 attributes, as specified in the open-ui "Interest Invokers" explainer.
 https://open-ui.org/components/interest-invokers.explainer/

 Enables the "context menu item only" behavior mode for the
 interestfor API. In this mode, the context menu is displayed in the
 "normal" location, but an additional line item is added to the menu which
 allows the user to show interest. This is enabled by default, but depends
 on HTMLInterestForAttribute.

 If this flag is enabled, the "partial interest" concept for the
 interestfor API is not used. When an interest invoker is focused,
 the target immediately gets full interest, regardless of whether it
 contains focusable content. This is primarily to test the behavior with
 users, to see which is the best.

 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

 crbug.com/40602913

 This change, although technically breaking, is expected to be fully web-compatible
 due to how import attributes are currently used in the ecosystem. However, this is
 a killswitch just in case. This can be removed once it ships to stable and no
 regressions are reported.

 Improved retargeting behavior of ToggleEvent.source and
 CommandEvent.source to match Event.relatedTarget.
 crbug.com/420639769

 When enabled, every traversable mainframe same-doc navigation will
 increment the viz::LocalSurfaceId from the impl thread.

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

 crbug.com/370217727

 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.

 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

 crbug.com/1420675

 Improved support for debugging CSSNestedDeclarations.

 If enabled, IntersectionObserverScrollMargin will be parsed.

 LayoutBox::PhysicalLocation() to return a truly visual offset - the
 offset of its first fragment relatively to the first fragment of its
 containing block, also when block-fragmented (used to be in the
 "stitched" flow-thread coordinate space).

 If enabled, the lazy load image observer will use a scroll margin in
 its init dictionary instead of a root margin.

 If enabled, the lazy load iframe observer will use a scroll margin in
 its init dictionary instead of a root margin.

 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

 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.

 Set to reflect the MediaCastOverlayButton feature.

 Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.

 This is a killswitch for <meta http-equiv="refresh"> no
 longer accepting fractions, landed around M125.
 It can be removed in M127 if there are no problems.

 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.

 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

 This is a killswitch for the behavior of Element::GetFocusableArea
 on delegatesFocus shadow hosts. This flag can be removed in M127 if
 things are stable.

 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 increase the end offset on getting the range for a new line
 character. See https://crbug.com/326888905

 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

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

 This flag makes the <option> element's label attribute render the
 contents of the label attribute even if it is only whitespace in order
 to match the spec and firefox. It also stops stripping/simplifying
 whitespace when using the label attribute for rendering.
 https://github.com/whatwg/html/issues/10955

 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.

 PARAKEET ad serving runtime flag/JS API.

 Uses base::Time::FromUTCString() in ParseDate() instead of code from
 ParseDateFromNullTerminatedCharacters() from date_math.cc.

 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

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

 Tracking bug for the implementation: https://crbug.com/1462930

 Tracking bug for the implementation: crbug.com/352249547
 This flag adds having the option to show an icon in the Permission
 element, if developers want to.
 The flag will enable us to land the feature over multiple CLs, and will
 be enabled after the feature has been fully implemented.

 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

 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.

 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.

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

 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.

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

 crbug.com/427520278
 Fix looking for next keyboard focusable radio button. This was added
 in M140 and can be removed after M143.

 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

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

 If enabled, the screen sizes reported through the Screen interface
 will be limited to the size of the viewport unless Window Management
 permission has been granted.

 If enabled, the deviceModel will be reduced to "K" and the
 androidVersion will be reduced to a static "10" string in android
 User-Agent string.

 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.

 If enabled, the platform and oscpu of the User-Agent string will be
 reduced.

 This flag allows more characters to be accepted as valid names in the
 createElement and attribute related DOM APIs.
 https://github.com/whatwg/dom/pull/1079
 http://crbug.com/40228234
 https://chromestatus.com/feature/6278918763708416

 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.

 This feature was shipped in M138, so this flag can be removed in M140.
 See https://issues.chromium.org/issues/415911524.

 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

 Allocates a render surface for 2D scale transforms, to prevent
 composited pixel alignment issues. See
 https://crbug.com/40084005

 Killswitch for retargeting drag events to UA shadow hosts.
 Added in M139, can be removed in M141.

 Kill-switch for crbug.com/414129878.
 Added in M139, and it can be removed in M141.

 New behavior when line breaker rewinds floats. crbug.com/1499290

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

 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/

 crbug.com/324111880

 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

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

 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.

 TODO(crbug.com/401443093): Remove after M141.

 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.

 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.

 Implements new UX for SPC including new output states, payment
 instrument details and payment entities logos.

 Implements improved accessibility mappings for having an <input>
 inside of a <select> by keeping the child <input> in the a11y tree at
 the same place that its at in the DOM tree, but automatically setting
 up a controls relationship to the menu list popup.

 Implements improved accessibility mappings for having an <input>
 inside of a <select> by reparenting the child <input> in the
 accessibility tree to be a sibling of the menu list popup.

 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

 Implement Selection API across shadow DOM: direction and
 getComposedRanges().
 https://w3c.github.io/selection-api/#dom-selection-getcomposedranges
 https://w3c.github.io/selection-api/#dom-selection-direction
 This should ship in M137, and it can be removed after M139.

 See https://crbug.com/417823377

 See https://crbug.com/395544401

 If enabled, the select element will not dispatch a mouseup event when
 an option is selected using the keyboard.
 This should ship in M135, and it can be removed after M137.
 http://crbug.com/396611142

 Makes the HTML parser allow most tags inside of <select> instead of
 only <option>, <optgroup>, and <hr>.
 https://github.com/whatwg/html/issues/10310

 This is a feature used only for deprecation origin trial participants
 to opt out of the SelectParserRelaxation new behavior. If this
 feature is enabled, then SelectParserRelaxation will be disabled,
 regardless of the state of that flag. This deprecation trial is
 supported through M140, so this flag can be removed in M141+.

 Kill-switch for crbug.com/40791925.
 Added in M138, and it can be removed in M140.

 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

 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

 crbug.com/329677645

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

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

 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

 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.

 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.

 Enables spec-compliant suffix matching for JSON MIME types
 (e.g., text/html+json, image/svg+json) by allowing *+json patterns.
 https://chromestatus.com/feature/5470594816278528

 Enables to run prerendering for new tabs (e.g., target="_blank").
 See https://crbug.com/1350676.

 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.

 Killswitch for https://crbug.com/40915318

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

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

 Gates the locks() method on a storage bucket.

 Feature for updating SVG presentation attribute style eagerly. This is
 a kill switch in case we encounter issues with this optimization.

 Enables loading of external SVG resource documents for the 'clip-path',
 'fill', 'stroke' and 'marker-*' properties.

 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.

 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/414858401

 crbug.com/414858401

 crbug.com/341564372

 crbug.com/325517313

 crbug.com/368657256

 This feature is used to inform the renderer of a user bypass from the
 browser process to disable third-party storage partitioning.

 Adds an "source" attribute to ToggleEvent which is set to the button
 that invoked the element which the toggle event was fired on, if
 appropriate.
 https://issues.chromium.org/issues/408018828
 https://github.com/whatwg/html/issues/9111

 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 enables drag and drop using touch input devices. Replaces
 the old "--enable-touch-drag-drop" and "--disable-touch-drag-drop"
 switches.

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

 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.

 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.

 Ensures symbols are treated as word boundaries during traversal.
 See https://crbug.com/40252642

 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.

 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.

 Fix for https://crbug.com/421314614

 For invalidation set tracking, we build a map from style rules to
 their containing sheets. When this flag is enabled, we use that same
 map for the Selector Stats feature.

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

 When enabled, makes links :visited even when the visit results in an
 HTTP error response code (4XX-5XX).

 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).

 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

 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 providing a URL to retrieve a WebAuthn challenge.
 https://chromestatus.com/feature/5109012922892288

 https://w3c.github.io/webauthn/#dom-clientcapability-conditionalcreate

 Prototyping https://github.com/w3c/webauthn/issues/2228

 Methods for deserializing WebAuthn requests from JSON/serializing
 responses into JSON.
 https://w3c.github.io/webauthn/#dom-publickeycredential-tojson
 https://w3c.github.io/webauthn/#sctn-parseCreationOptionsFromJSON
 https://w3c.github.io/webauthn/#sctn-parseRequestOptionsFromJSON

 https://w3c.github.io/webauthn/#prf-extension

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

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

 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.

 It is only enabled in extension environment for now.

 When enabled, the legacy format of the Digital Credentials request isn't
 supported anymore, and only the modern format is supported.

 Kill switch for making BigInt handling in WebIDL use ToBigInt.

 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.

 If enabled, the getDisplayMedia() family of APIs will ask for NV12
 frames, which should trigger a zero-copy path in the tab capture code.