::-moz-progress-bar

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

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

desktopmobile
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
ExperimentalNon-standard

See also