`-moz-device-pixel-ratio` CSS media feature

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.

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The -moz-device-pixel-ratio Gecko-only CSS media feature can be used to apply styles based on the number of device pixels per CSS pixel.

Warning: Do not use this feature. Use the resolution feature with the dppx unit instead.

Note: This media feature is also implemented by WebKit as -webkit-device-pixel-ratio. The min and max prefixes as implemented by Gecko are named min--moz-device-pixel-ratio and max--moz-device-pixel-ratio; but the same prefixes as implemented by WebKit are named -webkit-min-device-pixel-ratio and -webkit-max-device-pixel-ratio.

Syntax

<number>: The number of device pixels per CSS pixel.

Media: @media Accepts min/max prefixes: yes

Examples

Basic compatibility example

-moz-device-pixel-ratio may be used for compatibility with Firefox older than 16, and alongside -webkit-device-pixel-ratio for compatibility with WebKit-based browsers that do not support dppx.

Example:

css

/* First, set for WebKit-based browsers */
@media (-webkit-min-device-pixel-ratio: 2),
  (min--moz-device-pixel-ratio: 2) /* Older Firefox browsers (prior to firefox 16) */,
  (min-resolution: 2dppx) /* The standard way */,
  (min-resolution: 192dpi); /* dppx fallback */

Note: See this CSSWG article for compatibility good practices regarding resolution and dppx.

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-device-pixel-ratio` media feature Deprecated Non-standard	Chrome – No support Chrome footnote No support	Edge – No support Edge footnote No support	Firefox – Full support Firefox 4 (Release date: 2011-03-22) 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 4 (Release date: 2011-03-29) 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
: Non-standard. Check cross-browser support before using.
: Deprecated. Not for use in new websites.

-moz-device-pixel-ratio CSS media feature