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 value drag
Applies to all elements that create native windows, e.g. <window>, <panel>
Inherited no
Media visual
Computed value as specified
Animation type discrete
Canonical order the 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

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

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