Thank you for your interest in using beta. Whether you are just curious or already using beta, this reference will help you have the best possible experience.

Thunderbird Beta web page contains details about whether you should use beta, how to install, references, and other basic information - please read it first, then return to this article for more advanced information.

Beta start page is also a handy reference for frequently used links - avaialble in thunderbird as ≡ > Go > Mail Start Page.

How to help improve beta

• Please test the many major new features, plus improvements in pop accounts, calendar today pane, PGP, vCard, folder colors, and ... please report bugs that you find.
• Join the beta forum to keep up to date with the most recent information.
• Follow along as bugs are reported during the 102 testing and initial release, by CCing yourself to Bug 1772703 aka "tb102found" - Bugs found during testing and release of TB102.

Add-ons

Add-on authors are not obligated to have their add-ons work in beta. So expect some or all of your add-ons to not work. Or if they do work today, they may not work tomorrow. Consult the add-ons FAQ if you have difficulty.

Download locations

• Windows, Mac and generic linux
• Ubuntu from Canonical -- sudo snap install thunderbird --beta

How do I change from a beta version back to a release version?

How you change back to a release version depends on how you configured your profile data, and when you decide to make the change. If you only have one profile, then the best time to change is shortly before or within two to three weeks after version 102 ships publicly - while the beta is still version 103. This timing will minimize the possibility that data structures have changed. You have two options

1. Program installed in its own directory, data is in a dedicated profile, and you do not need any of the beta data (address books, local folders, pop folders, etc), and wish to remove the beta data and beta program from your system:
   • Start the release version of Thunderbird to use the profile manager.
   • Find and delete the beta profile, default name is “default-beta”.
   • Delete the beta version’s program directory.
2. Program installed in its own directory, data is in a dedicated profile, and you DO need beta data (address books, local folders, pop folders, etc)and wish to remove the beta data and beta program from your system: If you intend to abandon beta and you need to transfer data from beta back to release, t

Just start the release version of Thunderbird from a command line with -P –allow-downgrade, and when the profile manager appears, point

1. Program installed in its own directory, data is in a dedicated profile, and you DO need beta data (address books, local folders, pop

Beta isn't for me. How can I help?

Get involved lists many ways for you to help in the community, and places to learn more about Thunderbird.