- Aug 17, 2014
Firefox 92.0 Stable's release date is September 7, 2021. The new Stable version of the Firefox web browser is a stability and security release for the most part, but it does include new features as well.
New features and improvementsSupport for AVIF images enabled by default
Mozilla Firefox supports the AVIF image format by default now. It is a new image format developed by the Alliance for Open Media that is royalty-free, and based on the AV1 video codec, which is also royalty-free.
Firefox supports non-animated AVIF images in this initial release.
Firefox can display still images, with colorspace support for both full and limited range colors, and image transforms for mirroring and rotation.
Firefox users and organizations may use the preference image.avif.compliance_strictness to adjust the compliance strictness with the specification.
Note: The flag in Firefox that determines whether AVIF is enabled or not, image.avif.enabled , was set to FALSE on the test system. Load about:config and check the preference image.avif.enabled to see if it is enabled (TRUE) or not (FALSE).
Automatic updates to HTTPS
Mozilla's work on improving HTTP and HTTPS handling continues. After introducing a HTTPS-First policy for Firefox's private browsing mode in Firefox 91 to auto-update HTTP to HTTPS whenever possible, it integrated support for auto-upgrading to HTTPS using HTTPS RR as Alt-Svc headers.
The Alt-Svc header "allows a server to indicate that a particular resource should be loaded from a different server" while appearing to the user that it was still loaded from the same server.
- Full-color level support for video playback on many systems.
- Open alerts in tabs don't cause performance issues in other tabs that are using the same process.
- Redesigned certificate error pages for "better user experience".
- Mac: the Mac OS Share options are now accessible from the Firefox File menu.
- Mac: support for images containing ICC v4 profiles enabled.
- Mac: VoiceOver reports buttons and links marked as "expanded" correctly using aria-expanded attribute.
- Mac: Bookmark toolbar menus follow Firefox's visual styles now.