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Welcome to the official public wiki of the Mozilla Project!

This wiki is a publicly available resource for those wanting to learn more about the Mozilla Project. It is not designed nor intended for end-users. If you're looking for user support for any of Mozilla's products, visit our support site for end-users.

Firefox roadmap

See also: Platform 2026 Roadmap

Release information

Firefox 159.0.1

Released on 2026-11-03

Thunderbird 159.0

Released on 2026-10-27

All Releases

Firefox Release Management pointers

• Release calendar
• Release process overview
• Release owners
• More about release management…

Firefox Nightly community

Help us find and fix bugs.
Test upcoming features.

Start testing

Contributing to Mozilla

• Mozilla Events
• Connect with Mozilla, submit ideas
• Code, translate, document…

How to use this wiki

• Mozilla Community Participation Guidelines (CPG)
• About MozillaWiki
• Tips and tricks for MozillaWiki