On the standards track: Yes
Is Experimental: No
Is Deprecated: No
Not in Chrome
Not in Chrome Android
Not in Edge
In Firefox version 3.6 on 2010-01-21
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version 10 on 2012-10-26
In Quest Browser version 5.0 on undefined
In Opera version 11.5 on 2011-06-28
In Opera Android version 11.5 on 2011-10-12
Not in Safari
Not in Safari on iOS
Not in Samsung Internet
Not in WebView Android