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Release DateJanuary 24, 2017
Release OwnerGerry Chang
Corresponding ESR release 45.6.0
Nightly cycle length8 weeks
Beta cycle length10 weeks
Uplifts in Beta270 (9 backouts)
Uplifts in RC12 (2 backouts)
Total number of uplifts282
Betas14
Release Candidates2
Dot releases1
Release notes Consumer notes Developer notes
Key Milestones
Nightly start September 20
Beta start November 16
51.0 January 24
51.0.1 January 26