Rated 3 out of 5 stars

Does what it should do and is of great help.
However, it makes Thunderbird more or less unusable. Uses 100% of one of my cores. Disabling the extension immediatly resolve the problem. But with mailmindr running thunderbird becomes unusable.
5 Stars but as it doesn't work only 3

Thunderbird: 91.6.2
3 accounts, many folders and subfolders
ArchLinux System
Other addons: *cloud, AllowHTML Temp, AutoarchiveReloaded, CardBook, DKIM Verifier, Google-4Tb-Sync, MailMerge, Provider für CalDAV und CArddav, Provider für Exchange Active sync, TBsync

This review is for a previous version of the add-on (1.2.2). 

Hi Gregor,

thanks for taking the time to review the extension.

You're correct that there's a performance issue with many folders and emails. This is also known by the Thunderbird team, and we're working on a solution.

The system information you provided is also super helpful (thanks again), as I haven't tested mailmindr on Arch Linux yet.

If you're interested in becoming a tester for the performance issue please reach out to hello @ mailmindr.net

Have a good day and sorry for the inconvenience,

Arnd.