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This feature is obsolete.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:
-moz-boxObsolete since Gecko 64
- XUL box, mostly equivalent to
-moz-inline-boxObsolete since Gecko 64
- XUL inline box, mostly equivalent to
-moz-gridObsolete since Gecko 62
- XUL grid
-moz-inline-gridObsolete since Gecko 62
- XUL inline grid
-moz-grid-groupObsolete since Gecko 62
- XUL grid group
-moz-grid-lineObsolete since Gecko 62
- XUL grid line
-moz-stackObsolete since Gecko 62
- XUL stack
-moz-inline-stackObsolete since Gecko 62
- XUL inline stack
-moz-deckObsolete since Gecko 62
- XUL deck
-moz-popupObsolete since Gecko 62
- XUL popup
No compatibility data found. Please contribute data for "css.properties.display.display-xul" (depth: 10) to the MDN compatibility data repository.