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-window-dragging CSS property specifies whether a window is draggable or not. It only works in Chrome code, and only on Mac OS X.

The property was added in Firefox 35 to solve intermittent problems related to Firefox windows not being moveable when busy (bug 944836).

Initial valuedrag
Applies toall elements that create native windows, e.g. <window>, <panel>
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar


The -moz-window-dragging property is specified as one of the keyword values listed below.


The window is draggable.
The window is not draggable

Formal syntax

drag | no-drag


toolbarpaletteitem {
  -moz-window-dragging: no-drag;


This property is not part of any specification.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support No support No support

35 (35)

No support No support No support
Feature Android Android Webview Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support No support No support No support 35.0 (35) No support No support No support No support


Document Tags and Contributors

Contributors to this page: teoli, Sheppy, chrisdavidmills
Last updated by: teoli,