«  Firefox 133  »

Release DateNovember 26, 2024
Release OwnerDonal Meehan
Corresponding ESR releases 128.5.0 115.18.0
Nightly cycle length4 weeks
Beta cycle length4 weeks
Bugs fixed in nightly 1504
Uplifts in Beta131 (3 backouts)
Uplifts in RC7 (2 backouts)
Total number of uplifts138
Betas9
Release Candidates2
Dot releases0
Release notes Consumer notes Developer notes
Key Milestones
Nightly start October 1
Beta start October 29
133.0 100% rollout 65% adoption November 26
Planned 133.0.x December 10