On the standards track: Yes
Is Experimental: No
Is Deprecated: Yes
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 3.5 on 2009-06-30 Removed from Firefox version 22 on 2013-06-25
In Firefox for Android version 4 on 2011-03-29 Removed from Firefox for Android version 22 on 2013-06-25
In Internet Explorer version 9 on 2011-03-14
In Quest Browser version 5.0 on undefined
In Opera version 9 on 2006-06-20
In Opera Android version 10.1 on 2010-11-09
In Safari version 3 on 2007-10-26
In Safari on iOS version 3 on 2009-06-17
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09