Rated 1 out of 5 stars
This used to work once upon a time and it was great! I am not sure how long ago it stopped working but it has been a while. I have Thunderbird version 38.3.0. Reinstalled but nothing shows. The options button within the ThreadVis extension doesn't even function or bring up any window. It just seems dead.This review is for a previous version of the add-on (2.2.0).