Rated 5 out of 5 stars

Congratulations for creating such an useful extension!

But once installed the performance of Thunderbird, while navigating between emails, even scrolling, goes significantly down.
Is it possible to create a performance setting to uncouple CardBook (hooks) from viewing emails?

RE: After reading the last entry. (My French is not very well.) I've seen your comment to this issue. THIS SOLVED THE PROBLEM!

This review is for a previous version of the add-on (21.8).