On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 9 on 2011-02-03
In Chrome Android version 25 on 2013-02-27
In Edge version 12 on 2015-07-28
In Firefox version 4 on 2011-03-22
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version 11 on 2013-10-17
In Quest Browser version 5.0 on undefined
In Opera version 12 on 2012-06-14
In Opera Android version 12 on 2012-02-25
In Safari version 5.1 on 2011-07-20
In Safari on iOS version 8 on 2014-09-17
In Samsung Internet version 1.5 on 2013-09-25
In WebView Android version 4.4.3 on 2014-06-02