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.

The -moz-force-broken-image-icon extended CSS property can be used to force the broken image icon to be shown even when a broken image has an alt attribute.



A value of 1 means that the broken image icon is shown even if the image has an alt attribute. When the value 0 is used the image will act as usual and only display the alt attribute.
Note: Even if the value is set to 1 the alt attribute will still be displayed, alongside the broken image icon.

Formal definition

Initial value0
Applies toimages
Computed valueas specified
Animation typediscrete

Formal syntax




<img src='/broken/image/link.png' alt='Broken image link'>


img {
  -moz-force-broken-image-icon: 1;
  height: 100px;
  width: 100px;


ScreenshotLive sample
Note: Unless the image has a specified height and width the broken image icon will not be displayed but the alt attribute will also be hidden if -moz-force-broken-image-icon is set to 1.


  • This property will only work in Gecko-based browsers.
  • The use of this property is not recommended. A proper alt attribute should be used instead.


Not part of any standard.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome No support NoEdge No support NoFirefox Full support 1IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 4Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No


Full support  
Full support
No support  
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also