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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.

Deprecated since Gecko 57 (Firefox 57 / Thunderbird 57 / SeaMonkey 2.54)
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-binding CSS property is used by Mozilla-based applications to attach an XBL binding to a DOM element.


/* <url> value */
-moz-binding: url(;

/* Global values */
-moz-binding: inherited;
-moz-binding: initial;
-moz-binding: unset;


The URL for the XBL binding (including the fragment identifier).
No XBL binding is applied to the element.

Formal definition

Initial valuenone
Applies toall elements except generated content or pseudo-elements
Computed valueas specified
Animation typediscrete

Formal syntax

<url> | none


.exampleone {
  -moz-binding: url(;


Not part of any standard.

Browser compatibility

BCD tables only load in the browser

See also