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Release DateAugust 10, 2021
Release OwnerPascal Chevrel
Corresponding ESR releases 91.0.0 78.13.0
Nightly cycle length6 weeks
Beta cycle length4 weeks
Bugs fixed in nightly 1491
Uplifts in Beta121 (5 backouts)
Uplifts in RC5 (1 backout)
Total number of uplifts126
Betas9
Release Candidates2
Dot releases2
Release notes Consumer notes Developer notes
Key Milestones
Nightly start June 1
Beta start July 13
91.0 August 10
91.0.1 August 17
91.0.2 August 24