On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 14 on 2011-09-16
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-28
In Firefox version 1 on 2004-11-09
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version 5 on 1999-03-18
In Quest Browser version 5.0 on undefined
In Opera version 7 on 2003-01-28
In Opera Android version 10.1 on 2010-11-09
In Safari version 1 on 2003-06-23
In Safari on iOS version 3 on 2009-06-17
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 1.5 on 2009-04-27