On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 6 on 2010-09-02
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-29
In Firefox version 6 on 2011-08-16 Note: Before Firefox 14, the <progress> element was incorrectly classified as a form element, and therefore had a form attribute. This has been fixed. Firefox provides the ::-moz-progress-bar pseudo-element, which lets you style the part of the interior of the progress bar representing the amount of work completed so far.
In Firefox for Android version 6 on 2011-08-16 Note: Before Firefox for Android 14, the <progress> element was incorrectly classified as a form element, and therefore had a form attribute. This has been fixed. Firefox for Android provides the ::-moz-progress-bar pseudo-element, which lets you style the part of the interior of the progress bar representing the amount of work completed so far.
In Internet Explorer version 10 on 2012-10-26
In Quest Browser version 5.0 on undefined
In Opera version 11 on 2010-12-16
In Opera Android version 11 on 2011-03-22
In Safari version 6 on 2012-07-25
In Safari on iOS version 7 on 2013-09-18 Note: Safari on iOS does not support indeterminate progress bars (they are rendered like 0%-completed progress bars).
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 7 on 2013-09-18 Note: WebView on iOS does not support indeterminate progress bars (they are rendered like 0%-completed progress bars).