On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 2 on 2009-05-21
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-28
In Firefox version 19 on 2013-02-19
In Firefox for Android version 19 on 2013-02-19
In Internet Explorer version 8 on 2009-03-19
In Quest Browser version 5.0 on undefined
In Opera version 6 on 2001-12-18
In Opera Android version 14 on 2013-05-21
Not in Safari
Not in Safari on iOS
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 37 on 2014-09-03