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 12 on 2015-07-28
Not in Firefox
Not in Firefox for Android
In Internet Explorer from the start
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 on undefined
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09