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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.

A propriedade CSS -moz-binding é usada por aplicações baseadas em Mozilla para fixar um XBL binding a um elemento DOM.

Initial valuenone
Aplica-se aall elements except generated content or pseudo-elements
Computed valueas specified
Animation typediscrete


/* valor da <url> */
-moz-binding: url(http://www.example.org/xbl/htmlBindings.xml#checkbox);

/* Valores globais */
-moz-binding: inherited;
-moz-binding: initial;
-moz-binding: unset;


A URL para o XBL binding (incluindo o identificador de fragmento).
Nenhum XBL binding é aplicado ao elemento.

Sintaxe formal

<url> | none


.exampleone {
  -moz-binding: url(http://www.example.org/xbl/htmlBindings.xml#radiobutton);


Não faz parte de nenhuma especificação.

Compatibilidade do navegador

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome No support NoEdge No support NoFirefox No support 1 — 67
No support 1 — 67
Notes XBL is deprecated and being removed. See bug 1397874.
Notes Available only in chrome and UA style sheets.
IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android No support 4 — 67
No support 4 — 67
Notes Available only in chrome and UA style sheets.
Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No


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 implementation notes.
See implementation notes.

Veja também