On the standards track: Yes
Is Experimental: Yes
Is Deprecated: No
Not in Chrome
Not in Chrome Android
Not in Edge
In Firefox version 57 on 2017-11-14 Note: -moz-element() is limited to background-image, background, border-image and border-image-source. -moz-element() is limited to background-image and background.
In Firefox for Android version 60 on 2018-05-09 Note: -moz-element() is limited to background-image, background, border-image and border-image-source. -moz-element() is limited to background-image and background.
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