New
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More secure connections: Firefox can now automatically upgrade to HTTPS using HTTPS RR as Alt-Svc headers.
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Full-range color levels are now supported for video playback on many systems.
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Mac users can now access the macOS share options from the Firefox File menu.
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Support for images containing ICC v4 profiles is enabled on macOS.
Fixed
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Firefox performance with screen readers and other accessibility tools is no longer severely degraded if Mozilla Thunderbird is installed or updated after Firefox.
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macOS VoiceOver now correctly reports buttons and links marked as ‘expanded’ using the aria-expanded attribute.
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An open alert in a tab no longer causes performance issues in other tabs using the same process.
Changed
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The bookmark toolbar menus on macOS now follow Firefox visual styles.
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Certificate error pages have been redesigned for a better user experience.
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Continuing work to restructure Firefox’s JavaScript memory management to be more performant and use less memory.
Enterprise
- Various bug fixes and new policies have been implemented in the latest version of Firefox. See more details in the Firefox for Enterprise 92 Release Notes.
Developer
They improved a lot of things under the hood in this release. For example, they ported Localization API and Fluent to Rust. This has resulted in a small increase in performance, lower RAM consumption, and faster load times when interacting with the interface (menus, about:home, about:newtab).