On the standards track: Yes
Is Experimental: No
Is Deprecated: Yes
In Chrome version 1 on 2008-12-11 Removed from Chrome version 48 on 2016-01-20
In Chrome Android version 18 on 2012-06-27 Removed from Chrome Android version 48 on 2016-01-26
In Edge version 12 on 2015-07-28 Removed from Edge version 79 on 2020-01-15
In Firefox version 1.5 on 2005-11-29 Removed from Firefox version 59 on 2018-03-13
In Firefox for Android version 4 on 2011-03-29 Removed from Firefox for Android version 59 on 2018-03-13
In Internet Explorer version 9 on 2011-03-14
Not in Quest Browser
In Opera version ≤12.1 on undefined Removed from Opera version 35 on 2016-02-02
In Opera Android version ≤12.1 on undefined Removed from Opera Android version 35 on 2016-02-04
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 ≤37 on undefined Removed from WebView Android version 48 on 2016-01-26