Rated 5 out of 5 stars

Works exactly as intended on my accounts, using Betterbird on Arch Linux. Good job.

This review is for a previous version of the add-on (1.0.8). 

Rated 5 out of 5 stars

thank you. was driving me crazy, and was going to write this myself <3

This review is for a previous version of the add-on (1.0.8). 

Rated 5 out of 5 stars

The dev has fixed the add-on which is now perfectly working.
I use it to prevent notifications and disturbing new messages mentions for newsletter filtered folders I have configured.

This review is for a previous version of the add-on (1.0.4). 

I am sorry if the extension does not work for you. You can submit a detailed bug report on the github page, so it would be possible to investigate the problem and fix it for you and others. The next version, which is awaiting approval, has some more logging that can be enabled, so you can also wait for it to be released here to get more info.