Future Planned Changes
Browse our compatibility notes about the changes to be made with future Firefox releases. This list will be updated when a further change is planned, so subscribe to our site feed for updates. Be prepared today to make your site as great as possible!
Audio & Video
Canvas & WebGL
CSS
- Affecting
@-moz-document url-prefix()CSS hack will no longer work - Prefixed CSS3 multi-column properties will be removed
- Prefixed CSS Animations, Transforms, Transitions support will be removed
- Prefixed
cursortypes will be removed -moz-border-imagewill be removed-moz-outline-radiuswill be removed-moz-prefixed gradient support to be removed, make sure you have unprefixed gradients
DOM
<keygen>support will be droppedkeydownandkeyupevents will soon be fired during IME composition- Affecting Non-printable keys will soon stop firing
keypressevent windowwill be removed.content Elementwill be removed.moz Matches Selector() Mousewill be removedEvent .moz Pressure windowwill be removed.sidebar navigatorwill be removed.build ID
HTML
JavaScript
Miscellaneous
Networking
Plug-ins
Privacy & Security
- Affecting
@-moz-document url-prefix()CSS hack will no longer work - Setting cookies with
<meta http-equiv>will no longer be allowed - Web Crypto API will not be available on insecure sites
- Web
VR will not be available on insecure sites <keygen>support will be dropped- Affecting Insecure HTTP will be deprecated
- Affecting Third-party cookies may be disabled by default in the future
navigatorwill be removed.build ID