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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.
Release information
Firefox 147.0.3
Based on Gecko 147
Based on Gecko 147
Released on 2026-02-03
Thunderbird 147.0.1
Based on Gecko 147
Based on Gecko 147
Released on 2026-01-26
Firefox Release Management pointers
Contributing to Mozilla
- Mozilla projects (Firefox, Platform, Add-ons, etc.)
- Why contribute to Mozilla?
- Discover new ways to contribute