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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 147.0.1
Based on Gecko 147

Released on 2026-01-16

Thunderbird 147.0
Based on Gecko 147.0

Released on 2026-01-13

All Releases

Firefox Release Management pointers

• Release calendar
• Releasehttps://support.mozilla.org/ process overview
• Release owners
• More about release management…

Meet Mozilla at Fosdem 2026!

Contributing to Mozilla

• Mozilla projects (Firefox, Platform, Add-ons, etc.)
• Why contribute to Mozilla?
• Discover new ways to contribute

How to use this wiki

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