Developer reply by Philippe V.
Rated 2 out of 5 stars
Maybe it works, but how to setup it?
This review is for a previous version of the add-on (56.1).https://gitlab.com/CardBook/CardBook/-/wikis/Presentation
if this is not enough, contact me by email : cardbook (at) cardbook.icu
To create your own collections, you must have a Mozilla Add-ons account.