Rated 3 out of 5 stars

The biggest problem I see that this is a memory hog application.
Turning it on cause me to have to increase my swap space and with only 8 GB of memory has other problems too. The filter window expands so large I have to keep shrinking it to find the ok button at the bottom. I have very large list and likely need to trimmed down. Just wish the windows sizeing of the filter window would fit the screen and not have to keep scrollimg it. Another thing the fact that it memory hog and having such a smaller memory capacity these applicaiton needs to consider that. I see too much memory taken up. TB is getting way too big.

This review is for a previous version of the add-on (5.2.1). 

Why don't you raise some bugs on my github? Just got to
https://github.com/RealRaven2000/quickFilters/issues
and click on [New Issue]

The long windows is actually a Thunderbird bug - it has nothing to do with quickFilters, but I may find a workaround. Also the filtering mechanism itself that is from Thundebird, so I don't feel like quickFilters should get a bad rating for that,