Rated 5 out of 5 stars

I tried CardBook, TbSync with; TbSync-4-Google and Provider CalDAV & CardDAV two years ago. It looked as if Thunderbird was going to sort out there address book making all these add-ons redundant. This has not happened and of all of those I list only CardBook runs and now seems to work well, I have not done much with it was promising but now is very good.

The significant thing is that TB Address-books do not synchronise lists or as Google call them labels whereas CardBook does.

I found the initial set up notchy in CardBook but okay. I could re-enable it after a year disabled or delete restart TB and reinstall it in which case the old data may or may not be found (I wanted the old data to be cleared which CardBook does not do after a new installation not a restore).

You can work around the initial setting up it is easy enough. There is a section on Thunderbird on my blog

https://engineering.andrew-lohmann.me.uk/windows-2-linux---operating-systems/linux-windows-maintenance

This review is for a previous version of the add-on (91.3).