Releases/Firefox 86

Information and links to do with Firefox 86. This may be useful for Mozilla contributors actively working on the release. It is also a record for future reference.

About the 86 release

• Release owner: Pascal Chevrel (:pascalc)
• Corresponding ESR release: 78.8.0
• Milestones document for the 86 cycle timeline from Nightly to release.
• QA: Test Plan - PI requests - [Feature priorities]
• All experiments for 86
• Postmortem notes, 2 weeks after the release.

Release checklists

• Working checklists for 86
• ESR 78 checklists
• Blank checklist templates

Process docs

• Off-train releases - Various ways to ship features that aren't in-tree.
• Guidelines for relman: Uplift rules - Release tracking rules
• Security: Sec Triage - Sec-approval -

Dates of 86 releases

86.0a1 Nightly

• First released: 2020-12-14
• Release notes
• beta simulation reference doc

86 Beta

• 86.0b1 (dev ed and beta channels): 2021-01-25
• 86.0b6 End of EARLY_BETA_OR_EARLIER: 2021-02-04
• Release notes - staging - final

86.0 Release

• 2021-02-23
  • desktop: https://www.mozilla.org/firefox/86.0/releasenotes/

Queries

• Mission Control 1 crash dashboard: http://missioncontrol.telemetry.mozilla.org/
• Mission Control 2 crash dashboard: https://metrics.mozilla.com/public/sguha/mc2/missioncontrol_v2.html