On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 6 on 2010-09-02
In Chrome Android version 18 on 2012-06-27
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 8 on 2009-03-19
In Quest Browser version 5.0 on undefined
In Opera version 15 on 2013-07-02
In Opera Android version 14 on 2013-05-21
In Safari version 5 on 2010-06-07
In Safari on iOS version 4.2 on 2010-11-22
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 37 on 2014-09-03