Policy Controlled Features

This document lists policy-controlled features being implemented in browsers. It is broken into sections based on the standardization state of each feature. The names used here should be consistent between browsers implementing a particular feature, but there is no requirement that all browsers implement any single feature.

The exact definition of the behaviour controlled by each feature belongs in the spec which defines the feature. Those are linked where available.

Standardized Features

These features have been declared in a published version of the respective specification.

Feature name	Spec link(s)	Browser Support
`accelerometer`	Generic Sensor API	Chrome 66
`ambient-light-sensor`	Generic Sensor API	Behind a flag in Chrome⁷
`attribution-reporting`	Attribution Reporting API	Chrome 115
`autoplay`	HTML	Chrome 64
`battery`	Battery Status API	Status "Open" in Chrome
`bluetooth`	Web Bluetooth	Chrome 104
`camera`	Media Capture	Chrome 64
`ch-ua`	User-Agent Client Hints	Chrome 89
`ch-ua-arch`	User-Agent Client Hints	Chrome 89
`ch-ua-bitness`	User-Agent Client Hints	Chrome 89
`ch-ua-full-version`	User-Agent Client Hints	Chrome 89
`ch-ua-full-version-list`	User-Agent Client Hints	Behind a flag in Chrome⁸
`ch-ua-high-entropy-values`	User-Agent Client Hints	Chrome 89
`ch-ua-mobile`	User-Agent Client Hints	Chrome 89
`ch-ua-model`	User-Agent Client Hints	Chrome 89
`ch-ua-platform`	User-Agent Client Hints	Chrome 89
`ch-ua-platform-version`	User-Agent Client Hints	Chrome 89
`ch-ua-wow64`	User-Agent Client Hints	Chrome 89
`compute-pressure`	Compute Pressure API	Chrome 125
`cross-origin-isolated`	HTML	Experimental in Chrome 85
`direct-sockets`	Direct Sockets API
`display-capture`	Media Capture: Screen Share	Chrome 94
`encrypted-media`	Encrypted Media Extensions	Chrome 64
`execution-while-not-rendered`	Page Lifecycle	Behind a flag in Chrome¹
`execution-while-out-of-viewport`	Page Lifecycle	Behind a flag in Chrome¹
`fullscreen`	Fullscreen API	Chrome 62
`geolocation`	Geolocation API	Chrome 64
`gyroscope`	Generic Sensor API	Chrome 66
`hid`	WebHID API	Chrome 89
`identity-credentials-get`	Federated Credential Management API	Chrome 110
`idle-detection`	Idle Detection API	Chrome 94
`keyboard-map`	Keyboard API	Chrome 97
`magnetometer`	Generic Sensor API	Chrome 66
`mediasession`	Media Session API
`microphone`	Media Capture	Chrome 64
`midi`	Web MIDI	Chrome 64
`navigation-override`	CSS Spatial Navigation
`otp-credentials`	WebOTP API	Chrome 84
`payment`	Payment Request API	Chrome 60
`picture-in-picture`	Picture-in-Picture	Chrome 71
`publickey-credentials-get`	Web Authentication API	Chrome 84
`screen-wake-lock`	Wake Lock API	Chrome 84
`serial`	Web Serial API	Chrome 89
`sync-xhr`	XMLHttpRequest	Chrome 65
`storage-access`	Storage Access	Chrome 115
`usb`	WebUSB	Chrome 60
`web-share`	Web Share API	Chrome 86
`window-management`⁵	Window Management API	Chrome 111
`xr-spatial-tracking`²	WebXR Device API	Available as a Chrome Origin Trial

Proposed Features

These features have been proposed, but the definitions have not yet been integrated into their respective specs.

Feature name	Spec/PR link(s)	Browser Support
`autofill`	https://github.com/explainers-by-googlers/safe-text-input/blob/main/autofill.md
`clipboard-read`	w3c/clipboard-apis#120	Chrome 86
`clipboard-write`	w3c/clipboard-apis#120	Chrome 86
`deferred-fetch`	whatwg/fetch#1647
`gamepad`	w3c/gamepad#112
`language-detector`	https://github.com/webmachinelearning/translation-api	Chrome 138
`language-model`	https://github.com/webmachinelearning/prompt-api
`manual-text`	https://github.com/explainers-by-googlers/safe-text-input/blob/main/manual-text.md
`rewriter`	https://github.com/webmachinelearning/writing-assistance-apis
`speaker-selection`	w3c/mediacapture-output#96
`summarizer`	https://github.com/webmachinelearning/writing-assistance-apis	Chrome 138
`translator`	https://github.com/webmachinelearning/translation-api	Chrome 138
`writer`	https://github.com/webmachinelearning/writing-assistance-apis

Experimental Features

These features generally have an explainer only, but may be available for experimentation by web developers.

Feature name	Link(s)	Browser Support
`all-screens-capture`	Capture all screens API	In Origin Trial
`browsing-topics`	Explainer	Status "Started" in Chrome
`captured-surface-control`	Captured Surface Control API	In Origin Trial
`conversion-measurement`	Explainer	Experimental in Chrome³
`digital-credentials-create`	Explainer	Behind a flag in Chrome⁹
`digital-credentials-get`	Explainer	Behind a flag in Chrome⁶
`focus-without-user-activation`	focus-without-user-activation.md	Status "Open" in Chrome
`join-ad-interest-group`	Protected Audience (formerly FLEDGE)	Behind a flag in Chrome⁴
`local-fonts`	Local Font Access API and Explainer	Experimental in Chrome
`monetization`	Draft Spec
`run-ad-auction`	Protected Audience (formerly FLEDGE)	Behind a flag in Chrome⁴
`smart-card`	Draft Spec and Explainer	Prototyping in Chrome
`sync-script`		Behind a flag in Chrome¹
`trust-token-redemption`	Explainer	In Origin Trial in Chrome 84-87
`unload`	Explainer	Status "Started in Chrome
`vertical-scroll`	vertical_scroll.md	Behind a flag in Chrome¹

Retired Features

These features were once standardized or proposed, but their specification and/or implementations have been removed.

Feature name	Spec link(s)	Browser Support
`document-domain`	HTML	Formerly in Chrome, behind a flag
`window-placement`	Window Management API	Formerly in Chrome, changed to `window-management`⁵

Notes

[1]: To enable these, use the Chrome command line flag --enable-blink-features=ExperimentalProductivityFeatures.

[2]: Implemented in Chrome as vr prior to Chrome 79.

[3]: To enable this, use the Chrome command line flag --enable-blink-features=ConversionMeasurement.

[4]: To enable this, use the Chrome command line flag --enable-features=AdInterestGroupAPI,InterestGroupStorage,Fledge.

[5]: Implemented in Chrome 100 as window-placement; changed in Chrome 111 to window-management.

[6]: To enable this, use the Chrome command line flag --enable-features=WebIdentityDigitalCredentials.

[7]: To enable this, use the Chrome command line flag --enable-features=SensorExtraClasses.

[8]: To enable this, user the Chrome command line flag --enable-features=ClientHintUAHighEntropyValuesPermissionPolicy.

[9]: To enable this, use the Chrome command line flag --enable-features=WebIdentityDigitalCredentialsCreation.

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