Rated 4 out of 5 stars

There is an issue if you update from v94 to V96 maybe because there is a migration process of vcard in V95 that is not in V96.
So if you update your thunderbird and your addon to V96 and it doesn't work, you have to manually download and install V94 then V95 and then V96. And it works.

This review is for a previous version of the add-on (96.7).  This user has other reviews of this add-on.