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 12 on 2015-07-28
In Firefox version 6 on 2011-08-16
In Firefox for Android version 6 on 2011-08-16
In Internet Explorer version 9 on 2011-03-14
In Quest Browser version 5.0 on undefined
In Opera version 10.5 on 2010-03-02
In Opera Android version 11.1 on 2011-06-30
In Safari version 3 on 2007-10-26
Not in Safari on iOS
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09