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
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