On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 1 on 2008-12-11
In Chrome Android version 18 on 2012-06-27
In Edge version 15 on 2017-04-05
In Firefox version 49 on 2016-09-20
In Firefox for Android version 49 on 2016-09-20
Not in Internet Explorer
In Quest Browser version 5.0 on undefined
In Opera version 15 on 2013-07-02
In Opera Android version 15 on 2013-07-08
In Safari version 3 on 2007-10-26
In Safari on iOS version 2 on 2008-07-11
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 38 on 2014-10-08