Archive
Every changelog, explained.
Browse the complete Firefox desktop history: every Stable and ESR major or patch release recorded by Mozilla, every archived numbered Beta build, and every Nightly version train since the channel replaced Aurora. Major releases also include detailed MDN developer changes.
Channel
Category
2261 versions available
- Nightly155.0a1Jul 20, 2026
Firefox Nightly 155.0a1
Starting with Firefox 154, We’re testing a simpler tab context menu in Firefox Labs. Turn it on in Settings > Firefox Labs > Streamline tab menu and tell us what you think on Mozilla Connect . Bug 2031718
New(2)Developer & Extensions(1)Web Platform & APIs(3)6changes across 3categories Read more → - Beta154.0b4Jul 20, 2026
Firefox 154.0 Beta
Exceptions for sites that have their cookies & site data cleared on shutdown can now be set without exempting the site from tracking protection and other cookie restrictions.
New(8)Changed(4)Developer & Extensions(3)Web Platform & APIs(8)23changes across 4categories Read more → - Beta154.0b3
Firefox 154.0 Beta
Mozilla archive record for Firefox 154.0b3 Beta. This numbered build belongs to the Firefox 154.0 Beta train.
Build record(1)1change across 1category Read more → - Beta154.0b2
Firefox 154.0 Beta
Mozilla archive record for Firefox 154.0b2 Beta. This numbered build belongs to the Firefox 154.0 Beta train.
Build record(1)1change across 1category Read more → - Beta154.0b1
Firefox 154.0 Beta
Mozilla archive record for Firefox 154.0b1 Beta. This numbered build belongs to the Firefox 154.0 Beta train.
Build record(1)1change across 1category Read more → - Nightly154.0a1Jun 16, 2026
Firefox Nightly 154.0a1
Firefox 154.0a1 Nightly train. Nightly is a continuously updated daily-build channel, so this record represents the version train rather than every binary produced each day.
Build record(1)1change across 1category Read more → - Stable153.0.1Jul 28, 2026
Firefox 153.0.1
Addressed a startup crash on Windows that could occur after updating Firefox, when some of the application's internal files could not be loaded. Firefox should now start in these cases, although parts of the interface may not display correctly until a further update completes ( Bug 2056926 ).
Fixed(11)Changed(1)12changes across 2categories Read more → - Stable153.0Jul 21, 2026
Firefox 153.0
High Dynamic Range (HDR) video playback is now available on Windows - this feature needs HDR mode enabled for the display in Windows Settings - Display . Laptop displays that only offer "HDR video streaming" are not supported at this time. Some videos recorded on phones in certain orientations are currently not shown as HDR.
New(13)Changed(4)Security(1)Enterprise(1)Developer & Extensions(16)Web Platform & APIs(34)69changes across 6categories Read more →
Nightly
Beta