«  Firefox 140  »

Release DateJune 24, 2025
Release OwnerDonal Meehan
Corresponding ESR releases 140.0.0 · 128.12.0 · 115.25.0?
Nightly cycle length4 weeks
Beta cycle length4 weeks
Bugs fixed in nightly 2233
Uplifts in beta164 (0 backouts)
Uplifts in RC2 (0 backouts)
Uplifts in dot releases29 (0 backouts)
Total number of uplifts195
Betas9
Release Candidates1
Dot releases4
Release notes Consumer notes Developer notes
Key Milestones
Nightly start April 29
Beta start May 27
140.0 1% adoption June 24
140.0.1 Desktop-only 0% adoption June 26
140.0.2 Desktop-only 52% adoption June 27
140.0.3 Android-only July 1
140.0.4 28% adoption 100% rollout July 8