Rated 2 out of 5 stars
TB 60.5.1 (32-bit), with 1.2.1, nothing shows in Sort Account tab. Had this problem for quite a while with previous versions of this add on.
Only solution I found is to get your hands on this xpi version
Then install it from file using the gear icon at the top of Add-on manager. Once installed turn auto updates off for this extension.
Here's the link showing this is a known problem and a source for "manually_sort_folders-1.2.0pre2.xpi"
Rated 5 out of 5 stars
I have 11 mail accounts and like to arrange them for importance. Was previously using folderpane tools but that no longer works. Found this add-on via a folderpane review(LOL).
Works fine in TB 31.6.0 for sorting accounts but haven't tried it for sorting folders within an account. Nice job. Great add-on.