Rated 5 out of 5 stars

per Rico el oct. 13, 2020 ·

Unfortunately no longer usable in the current version.
:-(

Thunderbird Version: 60.9.1 (old Version)

This review is for a previous version of the add-on (3.1). 

per Alexey Bazhin (desenvolupador) a oct. 13, 2020 ·

What is the "current" version?
It is targeted to latest stable version 78 and up.
Versions below covered with original addon.