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

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

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

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

Examples

HTML

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

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`	No	No	6	No	No	No	6	No	No	No	No	No