Rated 3 out of 5 stars

Not is compatible Thunderbird 68.0. :(

This review is for a previous version of the add-on (1.3.04). 

This is currently being worked on, However there is a major bug to solve before I am willing to release a tb 68.0 version. I hope to have this resolved within the coming week.

Edit: A new version with 68+ support has been submitted and awaits approval