Rated 5 out of 5 stars

by 四天王寺 on Oct. 23, 2020 ·

It works fine with Thunderbird 78.4.0 !
Method:
［≡］ ＞ Tools ＞ Manually sort folders

This review is for a previous version of the add-on (2.0.5).  This user has other reviews of this add-on.