Rated 5 out of 5 stars

As noted previously:

Works great with TB60 if you disable extensions.strictCompatibility as noted in the release notes of TB60.

This will also work by editing the install.rdf file in the xpi for Manually sort folders v 1.1.1 to set

<em:maxVersion>60.*</em:maxVersion> for the target application.

I have verified this on four installations of TB60 on four computers (mine, mywife's, my son's and my daughtr's). My wife and I run macOS 10.13.6 and my son and daughter run WIN 10.

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