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 – available in thunderbird as > > .
Table of Contents
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-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.
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:
- Beta program installed in its own directory, beta data is in a dedicated profile, and you do not need any beta data (address books, local folders, pop folders, etc.) back in your production profile, and wish to remove the beta data and beta program from your system:
- Start the release version of Thunderbird to use the profile manager.
- Delete the beta profile using the profile manager, default name is “default-beta”.
- Delete the beta version’s program directory in your OS.
- Beta program installed in its own directory, beta data is in a dedicated profile, but you DO need beta data (address books, local folders, pop folders, etc.) copied back to your production profile. This gets messy and difficult, and is something you really want to avoid.
- While running beta, export your address book(s) to file(s) as vCard, which you can then import into version 91 (but version 91's lower capabilities might mean the results will be less than perfect).
- Open both of your profiles in your OS's file browser. One way of finding them is > > > .
- Shutdown both versions of Thunderbird.
- Backup your production profile.
- Under the Mail directory you will find both Local Folders directory and pop account directories – you can copy the contents of these from the beta profile to your production profile, taking care to NOT overwrite any msgFilters.dat files (which contain your filter rules) in your production profile.
- Imap accounts – there should be no need to copy any files from beta profile to your production profile.
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.