On the standards track: No
Is Experimental: No
Is Deprecated: Yes
In Chrome version 1 on 2008-12-11 Removed from Chrome version 45 on 2015-09-01
In Chrome Android version 18 on 2012-06-27 Removed from Chrome Android version 45 on 2015-09-01
Not in Edge
In Firefox version 1 on 2004-11-09 Removed from Firefox version 3 on 2008-06-17
Not in Firefox for Android
Not in Internet Explorer
Not in Quest Browser
In Opera version 15 on 2013-07-02 Removed from Opera version 32 on 2015-09-15
In Opera Android version 14 on 2013-05-21 Removed from Opera Android version 32 on 2015-09-23
In Safari version 3 on 2007-10-26
In Safari on iOS version 1 on 2007-06-29
In Samsung Internet version 1.0 on 2013-04-27 Removed from Samsung Internet version 5.0 on 2016-12-15
In WebView Android version 4.4 on 2013-12-09 Removed from WebView Android version 45 on 2015-09-01