Betterbird: FAQ

What is Betterbird?

Betterbird is a soft fork of Mozilla Thunderbird. Soft fork means that it is closely following the Thunderbird Extended Support Releases (ESR) therefore avoiding the mistakes of other forks which quickly lost track of upstream Thunderbird, thus opening users up to security vulnerabilities.

Why Betterbird?

Betterbird aims at providing a better user experience by fixing annoying bugs in Thunderbird and implementing new features. We will submit all changes to upstream to eventually benefit Thunderbird. As a first highlight, we re-established the header button customisation, as you can check here. Another productivity enhancer: A decent systray tooltip showing new messages and their folders:

Is Betterbird for me?

If you like Thunderbird but are discouraged by too many bugs, then give Betterbird a try. It is 100% compatible with Thunderbird's ESR version. You can install the same dot release of Thunderbird in parallel and switch between Betterbird and Thunderbird on the same profile without problems and without needing the -allow-downgrade command line switch.

Why do you only ship Windows 64bit binaries?

Simple: Biggest bang for the buck, there are just too many Windows users. Building many different versions is just too expensive for now. That said, Linux distributions that build Thunderbird can of course switch to Betterbird. We're happy to help! There is also a "one click" build using Ansible available at this GitHub repository.

In which languages will Betterbird ship?

Betterbird will ship in English, major European languages and Japanese. Thunderbird language packs do not work since Betterbird has additional strings. Drop us a line if your language isn't supported yet.

Will my add-ons work?

Yes, what runs in Thunderbird will run in Betterbird, you can install add-ons directly in-product from

Where is the source code kept?

The Thunderbird source code is kept in Mozilla repositories and we administer a public Github repository of the changes we apply to make it better.

When will Betterbird ship?

Betterbird 91.0 will ship when Thunderbird 91 ESR ships, that is, in August 2021. To keep versioning easy, we will follow Thunderbird versioning.

Who is behind Betterbird?

Betterbird is headed by Thunderbird's former maintainer who has been joined by a group of people who share the view that users deserve a better experience and who do not agree with the approach of the Thunderbird management.

How can I help?

Donate, donate, donate. If you know your way around the Thunderbird codebase and would like to donate your time, we'd like to hear from you.