Rated 5 out of 5 stars

This is the single most useful, must-have Thunderbird add-on.

I hope the author is able to update it for the new Thunderbird, I miss it so much.

This review is for a previous version of the add-on (4.4.1). 

The latest version 5.0.2 is compatible with Thunderbird 78 and was released on ATN on December 2nd.