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 79 on 2020-01-15
In Firefox version 35 on 2015-01-13 Note: Before Firefox 35, it was supported in Quirks Mode only.
In Firefox for Android version 35 on 2015-01-13 Note: Before Firefox for Android 35, it was supported in Quirks Mode only.
Not in Internet Explorer
In Quest Browser version 5.0 on undefined
In Opera version 15 on 2013-07-02
In Opera Android version 14 on 2013-05-21
In Safari version ≤4 on undefined
In Safari on iOS version ≤3.2 on undefined
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09
In WebView on iOS version ≤3.2 on undefined