Rated 5 out of 5 stars

The developer is very responsive and fixed the issue in just a few days with many emails back and forth to understand the problem. He even came out with 2 new versions during that time to resolve it. Very impressive.

This review is for a previous version of the add-on (57.3). 

Rated 1 out of 5 stars

It worked great for awhile. But it has ceased working properly. I have about 10,000 contacts over 3 different accounts and what's happening now is that I'm getting a strange message for each and every contact saying the following: "Contact Modification Conflict" and I have 3 choices "Prefer the local modification" "Prefer the remote modification" or "Merge the differences". I had just done a fresh in stall of Manjaro and so there were no contacts in Thunderbird when I started and I'm getting this message for each and every contact. I don't know why and there is no way to stop it so it takes over Thunderbird and you cannot use Thunderbird at all with Cardbook now. I've had to uninstall until this is resolved.

This review is for a previous version of the add-on (57.3). 

may you contact me by email : cardbook (at) cardbook.icu ?

(in CardBook, recreate your Google address books)