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-focusring CSS pseudo-class is a Mozilla extension that is similar to the :focus pseudo-class, but it only matches an element if it's currently focused and a focus ring or other indicator should be drawn around it.

If :-moz-focusring matches, then :focus also matches, but the converse is not always true: it depends on whether the user agent has focus ring drawing enabled and how the element was focused. Whether the user agent has focus ring drawing enabled can depend on operating system settings and other factors, so the precise behavior of this pseudo-class will vary from platform to platform.

Note: Developers tend to use :-moz-focusring to differentiate between the focus state when the user focuses an element via a mouse click versus keyboard tabbing. It is also potentially useful if you are creating a custom element and you want to change its style based on its behavior.





<input />


input {
  margin: 5px;

:-moz-focusring {
  color: red;
  outline: 2px dotted green;



This feature is not defined in any specification yet, though it was discussed in the working group and it was decided to add it to Selectors 4 or 5.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Chrome ? Edge ? Firefox Full support 4IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also

Document Tags and Contributors

Last updated by: fscholz,