`::-moz-progress-bar` CSS pseudo-element

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The ::-moz-progress-bar CSS pseudo-element is a Mozilla extension that represents the progress bar inside a <progress> element. (The bar represents the amount of progress that has been made.)

If you want to select the unfinished part of <progress> in Mozilla, please select the <progress> directly.

Syntax

css

::-moz-progress-bar {
  /* ... */
}

Examples

HTML

html

<progress value="30" max="100">30%</progress>
<progress max="100">Indeterminate</progress>

CSS

css

::-moz-progress-bar {
  background-color: red;
}

/* Force indeterminate bars to have zero width */
:indeterminate::-moz-progress-bar {
  width: 0;
}

Result

Specifications

Not part of any standard.

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`::-moz-progress-bar` Experimental Non-standard	Chrome – No support Chrome footnote No support	Edge – No support Edge footnote No support	Firefox – Full support Firefox 6 (Release date: 2011-08-16) footnote Full support	Opera – No support Opera footnote No support	Safari – No support Safari footnote No support	Chrome Android – No support Chrome Android footnote No support	Firefox for Android – Full support Firefox for Android 6 (Release date: 2011-08-16) footnote Full support	Opera Android – No support Opera Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – No support Samsung Internet footnote No support	WebView Android – No support WebView Android footnote No support	WebView on iOS – No support WebView on iOS footnote No support

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: Experimental. Expect behavior to change in the future.
: Non-standard. Check cross-browser support before using.

::-moz-progress-bar CSS pseudo-element

Legend

`::-moz-progress-bar` CSS pseudo-element