MDN’s new design is in Beta! A sneak peek:

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-user-modify property has no effect.

It was planned to determine whether or not the content of an element can be edited by a user. This property is related to the contenteditable attribute. A similar property user-focus was proposed in early drafts of a predecessor of the CSS3 UI specification but was rejected by the working group.

Initial valueread-only
Applies toall elements
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar


/* Keyword values */
-moz-user-modify: read-only;
-moz-user-modify: read-write;
-moz-user-modify: write-only;

/* Global values */
-moz-user-modify: inherit;
-moz-user-modify: initial;
-moz-user-modify: unset;


Default value. Contents are read-only.
The user is able to read and write contents.
The user is able to edit the content, but not to read it.

Formal syntax

read-only | read-write | write-only



.readwrite {
  -moz-user-modify: read-write;
  -webkit-user-modify: read-write;


<div class="readwrite">The user is able to change this text.</div>



user-modify in an early draft of the CSS 3 User Interface specification (Working Draft February 2000, now superseded by CSS 3 Basic User Interface)

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1[1]-webkit (Yes)[1]-webkit

No support[2]

No support No support 2.0 -khtml
3.0 -webkit[1]
Feature Android Android Webview Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support ? ? (Yes)-webkit No support ? ? ? 18[1]-webkit

[1] Also supported: -webkit-user-modify: read-write-plaintext-only (Richtext will be lost).
[2] While the CSS property is parsed and accepted, it does not have any effect.

See also

Document Tags and Contributors

 Last updated by: phistuck,