1. Web
  2. WebDriver
  3. Reference
  4. BiDi
  5. Modules
  6. emulation

emulation module

The emulation module contains commands for overriding the behavior of certain Web APIs, such as the Geolocation API and the Screen Orientation API, to simulate different environments.

Specifications

Specification
WebDriver BiDi
# module-emulation

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
emulation
Chrome – Full support
Chrome 137 (Release date: 2025-05-27)
footnote Full support
Edge – Full support
Edge 137 (Release date: 2025-05-29)
footnote Full support
Firefox – Full support
Firefox 139 (Release date: 2025-05-27)
footnote Full support
Opera – Full support
Opera 121 (Release date: 2025-08-27)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 137 (Release date: 2025-05-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 139 (Release date: 2025-05-27)
footnote Full support
Opera Android – Full support
Opera Android 90 (Release date: 2025-06-18)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 137 (Release date: 2025-05-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setGeolocationOverride command
Chrome – Full support
Chrome 137 (Release date: 2025-05-27)
footnote Full support
Edge – Full support
Edge 137 (Release date: 2025-05-29)
footnote Full support
Firefox – Full support
Firefox 139 (Release date: 2025-05-27)
footnote
footnote Firefox doesn't support the global configuration yet.
Opera – Full support
Opera 121 (Release date: 2025-08-27)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 291197
Chrome Android – Full support
Chrome Android 137 (Release date: 2025-05-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 139 (Release date: 2025-05-27)
footnote
footnote Firefox for Android doesn't support the global configuration yet.
Opera Android – Full support
Opera Android 90 (Release date: 2025-06-18)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 291197
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 137 (Release date: 2025-05-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 291197
contexts parameter
Chrome – Full support
Chrome 137 (Release date: 2025-05-27)
footnote Full support
Edge – Full support
Edge 137 (Release date: 2025-05-29)
footnote Full support
Firefox – Full support
Firefox 139 (Release date: 2025-05-27)
footnote Full support
Opera – Full support
Opera 121 (Release date: 2025-08-27)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 137 (Release date: 2025-05-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 139 (Release date: 2025-05-27)
footnote Full support
Opera Android – Full support
Opera Android 90 (Release date: 2025-06-18)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 137 (Release date: 2025-05-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
coordinates parameter
Chrome – Full support
Chrome 137 (Release date: 2025-05-27)
footnote Full support
Edge – Full support
Edge 137 (Release date: 2025-05-29)
footnote Full support
Firefox – Full support
Firefox 139 (Release date: 2025-05-27)
footnote Full support
Opera – Full support
Opera 121 (Release date: 2025-08-27)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 137 (Release date: 2025-05-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 139 (Release date: 2025-05-27)
footnote Full support
Opera Android – Full support
Opera Android 90 (Release date: 2025-06-18)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 137 (Release date: 2025-05-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
error parameter
Experimental
Chrome – Full support
Chrome 137 (Release date: 2025-05-27)
footnote Full support
Edge – Full support
Edge 137 (Release date: 2025-05-29)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 121 (Release date: 2025-08-27)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 137 (Release date: 2025-05-27)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 90 (Release date: 2025-06-18)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 137 (Release date: 2025-05-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Chrome – Full support
Chrome 137 (Release date: 2025-05-27)
footnote Full support
Edge – Full support
Edge 137 (Release date: 2025-05-29)
footnote Full support
Firefox – Full support
Firefox 139 (Release date: 2025-05-27)
footnote Full support
Opera – Full support
Opera 121 (Release date: 2025-08-27)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 137 (Release date: 2025-05-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 139 (Release date: 2025-05-27)
footnote Full support
Opera Android – Full support
Opera Android 90 (Release date: 2025-06-18)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 137 (Release date: 2025-05-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setLocaleOverride command
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 142 (Release date: 2025-08-19)
footnote
footnote Before Firefox 144, the locale override was shared with all the other browsing contexts living in the same web content process.
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 303181
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 142 (Release date: 2025-08-19)
footnote
footnote Before Firefox for Android 144, the locale override was shared with all the other browsing contexts living in the same web content process.
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303181
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303181
contexts parameter
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 142 (Release date: 2025-08-19)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 142 (Release date: 2025-08-19)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
Applies override to newly created cross-origin iframes.
Experimental Non-standard
Chrome – No support
Chrome
footnote No support
Edge – No support
Edge
footnote No support
Firefox – Full support
Firefox 143 (Release date: 2025-09-16)
footnote Full support
Opera – No support
Opera
footnote No support
Safari – No support
Safari
footnote No support
Chrome Android – No support
Chrome Android
footnote No support
Firefox for Android – Full support
Firefox for Android 143 (Release date: 2025-09-16)
footnote Full support
Opera Android – No support
Opera Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – No support
WebView Android
footnote No support
WebView on iOS – No support
WebView on iOS
footnote No support
locale parameter
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 142 (Release date: 2025-08-19)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 142 (Release date: 2025-08-19)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
Sets the Accept-Language HTTP header.
Experimental Non-standard
Chrome – No support
Chrome
footnote No support
Edge – No support
Edge
footnote No support
Firefox – Full support
Firefox 147 (Release date: 2026-01-13)
footnote Full support
Opera – No support
Opera
footnote No support
Safari – No support
Safari
footnote No support
Chrome Android – No support
Chrome Android
footnote No support
Firefox for Android – Full support
Firefox for Android 147 (Release date: 2026-01-13)
footnote Full support
Opera Android – No support
Opera Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – No support
WebView Android
footnote No support
WebView on iOS – No support
WebView on iOS
footnote No support
Sets the navigator.language and navigator.languages properties.
Non-standard
Chrome – Full support
Chrome 142 (Release date: 2025-10-28)
footnote Full support
Edge – Full support
Edge 142 (Release date: 2025-10-31)
footnote Full support
Firefox – Full support
Firefox 146 (Release date: 2025-12-09)
footnote Full support
Opera – Full support
Opera 126 (Release date: 2026-01-08)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 142 (Release date: 2025-10-28)
footnote Full support
Firefox for Android – Full support
Firefox for Android 146 (Release date: 2025-12-09)
footnote Full support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 142 (Release date: 2025-10-28)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
Applies override to existing sandboxes.
Experimental Non-standard
Chrome – No support
Chrome
footnote No support
Edge – No support
Edge
footnote No support
Firefox – Full support
Firefox 144 (Release date: 2025-10-14)
footnote Full support
Opera – No support
Opera
footnote No support
Safari – No support
Safari
footnote No support
Chrome Android – No support
Chrome Android
footnote No support
Firefox for Android – Full support
Firefox for Android 144 (Release date: 2025-10-14)
footnote Full support
Opera Android – No support
Opera Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – No support
WebView Android
footnote No support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 142 (Release date: 2025-08-19)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 142 (Release date: 2025-08-19)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setNetworkConditions command
Chrome – Full support
Chrome 143 (Release date: 2025-12-02)
footnote Full support
Edge – Full support
Edge 143 (Release date: 2025-12-05)
footnote Full support
Firefox – Full support
Firefox 150 (Release date: 2026-04-21)
footnote Full support
Opera – Full support
Opera 127 (Release date: 2026-02-02)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 303182
Chrome Android – Full support
Chrome Android 143 (Release date: 2025-12-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 150 (Release date: 2026-04-21)
footnote Full support
Opera Android – Full support
Opera Android 94 (Release date: 2026-01-13)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303182
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 143 (Release date: 2025-12-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303182
contexts parameter
Chrome – Full support
Chrome 143 (Release date: 2025-12-02)
footnote Full support
Edge – Full support
Edge 143 (Release date: 2025-12-05)
footnote Full support
Firefox – Full support
Firefox 150 (Release date: 2026-04-21)
footnote Full support
Opera – Full support
Opera 127 (Release date: 2026-02-02)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 143 (Release date: 2025-12-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 150 (Release date: 2026-04-21)
footnote Full support
Opera Android – Full support
Opera Android 94 (Release date: 2026-01-13)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 143 (Release date: 2025-12-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
networkConditions parameter
Chrome – Full support
Chrome 143 (Release date: 2025-12-02)
footnote Full support
Edge – Full support
Edge 143 (Release date: 2025-12-05)
footnote Full support
Firefox – Full support
Firefox 150 (Release date: 2026-04-21)
footnote Full support
Opera – Full support
Opera 127 (Release date: 2026-02-02)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 143 (Release date: 2025-12-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 150 (Release date: 2026-04-21)
footnote Full support
Opera Android – Full support
Opera Android 94 (Release date: 2026-01-13)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 143 (Release date: 2025-12-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
"offline"
Chrome – Full support
Chrome 143 (Release date: 2025-12-02)
footnote Full support
Edge – Full support
Edge 143 (Release date: 2025-12-05)
footnote Full support
Firefox – Full support
Firefox 150 (Release date: 2026-04-21)
footnote Full support
Opera – Full support
Opera 127 (Release date: 2026-02-02)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 143 (Release date: 2025-12-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 150 (Release date: 2026-04-21)
footnote Full support
Opera Android – Full support
Opera Android 94 (Release date: 2026-01-13)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 143 (Release date: 2025-12-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Chrome – Full support
Chrome 143 (Release date: 2025-12-02)
footnote Full support
Edge – Full support
Edge 143 (Release date: 2025-12-05)
footnote Full support
Firefox – Full support
Firefox 150 (Release date: 2026-04-21)
footnote Full support
Opera – Full support
Opera 127 (Release date: 2026-02-02)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 143 (Release date: 2025-12-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 150 (Release date: 2026-04-21)
footnote Full support
Opera Android – Full support
Opera Android 94 (Release date: 2026-01-13)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 143 (Release date: 2025-12-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setScreenOrientationOverride command
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 144 (Release date: 2025-10-14)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 303183
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 144 (Release date: 2025-10-14)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303183
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303183
contexts parameter
Experimental
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
screenOrientation parameter
Experimental
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Experimental
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setScreenSettingsOverride command
Experimental
Chrome – No support
Chrome
footnote No support
Edge – No support
Edge
footnote No support
Firefox – Full support
Firefox 147 (Release date: 2026-01-13)
footnote Full support
Opera – No support
Opera
footnote No support
Safari – No support
Safari
footnote
footnote See bug 303188
Chrome Android – No support
Chrome Android
footnote No support
Firefox for Android – Full support
Firefox for Android 147 (Release date: 2026-01-13)
footnote Full support
Opera Android – No support
Opera Android
footnote No support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303188
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – No support
WebView Android
footnote No support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303188
emulation.setScriptingEnabled command
Experimental
Chrome – Full support
Chrome 141 (Release date: 2025-09-30)
footnote Full support
Edge – Full support
Edge 141 (Release date: 2025-10-03)
footnote Full support
Firefox – No support
Firefox
footnote
footnote See bug 1982563
Opera – Full support
Opera 125 (Release date: 2025-12-04)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 303184
Chrome Android – Full support
Chrome Android 141 (Release date: 2025-09-30)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote
footnote See bug 1982563
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303184
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 141 (Release date: 2025-09-30)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303184
contexts parameter
Experimental
Chrome – Full support
Chrome 141 (Release date: 2025-09-30)
footnote Full support
Edge – Full support
Edge 141 (Release date: 2025-10-03)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 125 (Release date: 2025-12-04)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 141 (Release date: 2025-09-30)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 141 (Release date: 2025-09-30)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
enabled parameter
Experimental
Chrome – Full support
Chrome 141 (Release date: 2025-09-30)
footnote Full support
Edge – Full support
Edge 141 (Release date: 2025-10-03)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 125 (Release date: 2025-12-04)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 141 (Release date: 2025-09-30)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 141 (Release date: 2025-09-30)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Experimental
Chrome – Full support
Chrome 141 (Release date: 2025-09-30)
footnote Full support
Edge – Full support
Edge 141 (Release date: 2025-10-03)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 125 (Release date: 2025-12-04)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 141 (Release date: 2025-09-30)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 141 (Release date: 2025-09-30)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setTimezoneOverride command
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 144 (Release date: 2025-10-14)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 303185
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 144 (Release date: 2025-10-14)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303185
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303185
contexts parameter
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 144 (Release date: 2025-10-14)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 144 (Release date: 2025-10-14)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
timezone parameter
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 144 (Release date: 2025-10-14)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 144 (Release date: 2025-10-14)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Chrome – Full support
Chrome 140 (Release date: 2025-09-02)
footnote Full support
Edge – Full support
Edge 140 (Release date: 2025-09-05)
footnote Full support
Firefox – Full support
Firefox 144 (Release date: 2025-10-14)
footnote Full support
Opera – Full support
Opera 124 (Release date: 2025-11-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 140 (Release date: 2025-09-02)
footnote Full support
Firefox for Android – Full support
Firefox for Android 144 (Release date: 2025-10-14)
footnote Full support
Opera Android – Full support
Opera Android 92 (Release date: 2025-10-08)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 140 (Release date: 2025-09-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
emulation.setUserAgentOverride command
Chrome – Full support
Chrome 142 (Release date: 2025-10-28)
footnote Full support
Edge – Full support
Edge 142 (Release date: 2025-10-31)
footnote Full support
Firefox – Full support
Firefox 145 (Release date: 2025-11-11)
footnote Full support
Opera – Full support
Opera 126 (Release date: 2026-01-08)
footnote Full support
Safari – No support
Safari
footnote
footnote See bug 303186
Chrome Android – Full support
Chrome Android 142 (Release date: 2025-10-28)
footnote Full support
Firefox for Android – Full support
Firefox for Android 145 (Release date: 2025-11-11)
footnote Full support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote
footnote See bug 303186
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 142 (Release date: 2025-10-28)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote
footnote See bug 303186
contexts parameter
Chrome – Full support
Chrome 142 (Release date: 2025-10-28)
footnote Full support
Edge – Full support
Edge 142 (Release date: 2025-10-31)
footnote Full support
Firefox – Full support
Firefox 145 (Release date: 2025-11-11)
footnote Full support
Opera – Full support
Opera 126 (Release date: 2026-01-08)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 142 (Release date: 2025-10-28)
footnote Full support
Firefox for Android – Full support
Firefox for Android 145 (Release date: 2025-11-11)
footnote Full support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 142 (Release date: 2025-10-28)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userAgent parameter
Chrome – Full support
Chrome 142 (Release date: 2025-10-28)
footnote Full support
Edge – Full support
Edge 142 (Release date: 2025-10-31)
footnote Full support
Firefox – Full support
Firefox 145 (Release date: 2025-11-11)
footnote Full support
Opera – Full support
Opera 126 (Release date: 2026-01-08)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 142 (Release date: 2025-10-28)
footnote Full support
Firefox for Android – Full support
Firefox for Android 145 (Release date: 2025-11-11)
footnote Full support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 142 (Release date: 2025-10-28)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
userContexts parameter
Chrome – Full support
Chrome 142 (Release date: 2025-10-28)
footnote Full support
Edge – Full support
Edge 142 (Release date: 2025-10-31)
footnote Full support
Firefox – Full support
Firefox 145 (Release date: 2025-11-11)
footnote Full support
Opera – Full support
Opera 126 (Release date: 2026-01-08)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 142 (Release date: 2025-10-28)
footnote Full support
Firefox for Android – Full support
Firefox for Android 145 (Release date: 2025-11-11)
footnote Full support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 142 (Release date: 2025-10-28)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support

Tip: you can click/tap on a cell for more information.

Full support
No support
Experimental. Expect behavior to change in the future.
Non-standard. Check cross-browser support before using.
See implementation notes.

This page was last modified on by MDN contributors.

Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
Portions of this content are ©1998–2026 by individual mozilla.org contributors. Content available under a Creative Commons license.