Welcome to Thunderbird Beta

You are using the beta version of Thunderbird, which means you get to experience improvements and fixes before the rest of our users! But with great power comes great responsibility, we hope you’ll take the time to report bugs and provide feedback on your experience. Thank you for helping to make the next Thunderbird release as awesome as possible. Learn more about the Beta.

WARNING: Add-ons in Thunderbird Betas can be fragile, meaning they may not work properly in your current beta, may break in a future Thunderbird Beta, and you may have installation problems. Anyone using or thinking of using add-ons in beta versions should read our add-ons KB article, especially if you are currently using Thunderbird Beta version 60 or older.


Betas often have rough edges. If you need help setting up an account or learning to do something else in Thunderbird - you can check out our support page. Visit Beta forum where you can discuss the release and meet other Beta users. If you believe you are encountering a bug, please use the “report a bug” link below, otherwise you can ask a new question.


Think you've found a problem with Thunderbird Beta? Create a bug report so that we can make sure it gets solved. Helping us identify and fix bugs makes for a better Thunderbird experience for all.


Thunderbird is both free and freedom respecting, but we're also completely funded by donations! The best way for you to ensure Thunderbird remains available and awesome is to donate so that the project can hire developers, pay for infrastructure, and continue to improve.


Don’t just use the Beta, help other users and improve the experience! Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users. Join us and become a part of the team that creates Thunderbird.

Submit Crash Reports

Please report every crash. The Mozilla Crash Reporter gives valuable data on which crashes are the most serious. And if you are comfortable doing so, please also add a public comment, and supply your email address (which is non-public) to allow us to contact you if we need to.