Beta Firefox Beta
Firefox Beta stabilises features that already cleared Nightly. What ships here is a preview of the next general release.
All Beta releases
1,459 tracked changes across 1437 releases
- 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 → - Beta153.0b13
Firefox 153.0 Beta
Mozilla archive record for Firefox 153.0b13 Beta. This numbered build belongs to the Firefox 153.0 Beta train.
Build record(1)1change across 1category Read more → - Beta153.0b12
Firefox 153.0 Beta
Mozilla archive record for Firefox 153.0b12 Beta. This numbered build belongs to the Firefox 153.0 Beta train.
Build record(1)1change across 1category Read more → - Beta153.0b11
Firefox 153.0 Beta
Mozilla archive record for Firefox 153.0b11 Beta. This numbered build belongs to the Firefox 153.0 Beta train.
Build record(1)1change across 1category Read more → - Beta153.0b10
Firefox 153.0 Beta
Mozilla archive record for Firefox 153.0b10 Beta. This numbered build belongs to the Firefox 153.0 Beta train.
Build record(1)1change across 1category Read more →