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 45 on 2016-03-08
In Firefox for Android version 45 on 2016-03-08
In Internet Explorer version 5.5 on 2000-07-06
In Quest Browser version 5.0 on undefined
In Opera version 9.6 on 2008-10-08
In Opera Android version 10.1 on 2010-11-09
In Safari version 1 on 2003-06-23
In Safari on iOS version 1 on 2007-06-29
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 1 on 2008-09-23