On the standards track: No
Is Experimental: No
Is Deprecated: Yes
Not in Chrome
Not in Chrome Android
Not in Edge
In Firefox version 61 on 2018-06-26 Note: Only supports an empty url-prefix() value, which is supported due to its use in Firefox browser detection. Still supported in user stylesheets.
In Firefox for Android version 61 on 2018-06-26 Note: Only supports an empty url-prefix() value, which is supported due to its use in Firefox for Android browser detection. Still supported in user stylesheets.
Not in Internet Explorer
Not in Quest Browser
Not in Opera
Not in Opera Android
Not in Safari
Not in Safari on iOS
Not in Samsung Internet
Not in WebView Android
Not in WebView on iOS