Non-standard
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 62 (Firefox 62 / Thunderbird 62 / SeaMonkey 2.59)
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.

Obsolete since Gecko 64 (Firefox 64 / Thunderbird 64 / SeaMonkey 2.61)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

Firefox supports the following -moz- prefixed XUL display values:

Syntax

-moz-box Obsolete since Gecko 64
XUL box, mostly equivalent to flex
-moz-inline-box Obsolete since Gecko 64
XUL inline box, mostly equivalent to inline-flex
-moz-grid Obsolete since Gecko 62
XUL grid
-moz-inline-grid Obsolete since Gecko 62
XUL inline grid
-moz-grid-group Obsolete since Gecko 62
XUL grid group
-moz-grid-line Obsolete since Gecko 62
XUL grid line
-moz-stack Obsolete since Gecko 62
XUL stack
-moz-inline-stack Obsolete since Gecko 62
XUL inline stack
-moz-deck Obsolete since Gecko 62
XUL deck
-moz-popup Obsolete since Gecko 62
XUL popup

All XUL display values, with the exception of -moz-box and -moz-inline-box, have been removed in bug 1288572. See this Firefox Site Compatibility post for more details.

The -moz-box and -moz-inline-box values will be removed later in bug 879275. See this Firefox Site Compatibility post for more details.

Browser compatibility

No compatibility data found. Please contribute data for "css.properties.display.display-xul" (depth: 10) to the MDN compatibility data repository.

See also