On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 46 on 2015-10-13
In Chrome Android version 46 on 2015-10-14
In Edge version 79 on 2020-01-15
In Firefox version 127 on 2024-06-11 Note: Only HTTP pages were supported.
In Firefox for Android version 127 on 2024-06-11 Note: Only HTTP pages were supported.
Not in Internet Explorer
In Quest Browser version 5.0 on undefined
In Opera version 33 on 2015-10-27
In Opera Android version 33 on 2015-11-03
In Safari version 5 on 2010-06-07
In Safari on iOS version 26 on 2025-09-15
In Samsung Internet version 5.0 on 2016-12-15
In WebView Android version 46 on 2015-10-14
In WebView on iOS version 26 on 2025-09-15