Rated 5 out of 5 stars

Fantastic add-on, thank you very much!

It DOES WORK on Thunderbird 68 !

To all those who think it doesn't work -- find it under Tools on the Menu Bar at the top. You have to show the Menu Bar, it's not visible in the hamburger menu (☰) on the right.

This review is for a previous version of the add-on (2.0.2).