Nightly Firefox Nightly
Daily Firefox builds. Nightly is where new ideas land first — often months before they reach Stable.
All Nightly releases
104 tracked changes across 99 releases
- 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 → - 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 → - Nightly153.0a1May 19, 2026
Firefox Nightly 153.0a1
Firefox 153.0a1 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 → - Nightly152.0a1Apr 21, 2026
Firefox Nightly 152.0a1
Firefox 152.0a1 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 → - Nightly151.0a1Mar 24, 2026
Firefox Nightly 151.0a1
Firefox 151.0a1 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 → - Nightly150.0a1Feb 24, 2026
Firefox Nightly 150.0a1
Firefox 150.0a1 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 → - Nightly149.0a1Jan 13, 2026
Firefox Nightly 149.0a1
Firefox 149.0a1 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 → - Nightly148.0a1Dec 9, 2025
Firefox Nightly 148.0a1
Firefox 148.0a1 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 →