Rated 5 out of 5 stars
A big thumbs up to you for creating TbSync!
I have been a dedicated Mozilla user ever since the "Mozilla Suite" came out years ago. And I now carry on using Firefox & Thunderbird.
The developers of Thunderbird sadly left a lot of Google users behind in the dust with their latest update to 78, neglecting support for full Google integration, including calendar and contacts. Being one of the estimated 1.5 billion Gmail users worldwide, I was disheartened, to say the least.
After a couple of hours of searching, I happily came across your wonderful TbSync! Yea!!!
Thank you so much for making that available to us and for your guidance on how to get it set up and working.
A key action to get it working is your helpful instruction to go to Settings, Cofig Editor and toggle on "extensions.dav4tbsync.googlesupport".
All the best to you!