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Release information

Firefox 140.0.4
Based on Gecko 140

Released on 2025-07-07

Thunderbird 140.0.1
Based on Gecko 140.0.1

Released on 2025-07-09

All Releases

Firefox Release Management pointers

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

Support for users

Support for developers

Firefox Docs

Contributing to Mozilla

• Mozilla project-wide status meetings (every Monday)
• Other project calls
• Mozilla projects (Firefox, Platform, Add-ons, etc.)
• Student Ambassadors
• 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

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