Rated 4 out of 5 stars

In case you have trouble figuring out how to use it, as I did: Go into the Options for the add-on. Choose the "Sort folders" tab at the top. Make an appropriate choice in the first drop-down field. Then (and this is the part I had trouble with): instead of the default "Use Thunderbird's default" in the second drop-down field, you must choose "Use a manually defined sort function." Only then will the green up and down arrows appear. I must credit https://diaryofdennis.com/2014/01/05/how-to-manually-sort-thunderbird-accounts/ for getting me unstuck.

This review is for a previous version of the add-on (1.1.1).