Apparently, they did a rework of the interface a few years ago. https://github.com/thunderbird/developer-docs/blob/master/thunderbird-development/codebase-over

Apparently, they did a rework of the interface a few years ago. https://github.com/thunderbird/developer-docs/blob/master/thunderbird-development/codebase-overview/mail-front-end.md https://github.com/thunderbird/developer-docs/blob/master/th... and https://blog.thunderbird.net/2023/02/the-future-of-thunderbird-why-were-rebuilding-from-the-ground-up/ https://blog.thunderbird.net/2023/02/the-future-of-thunderbi...