Rated 5 out of 5 stars
If you care about junk mail filtering at all, install this addon now and take a little time to play with it. It's not very useful until you show the columns for junk probability and junk status in the email lists. Once you do that you'll be encouraged to play with it. Also check out the options panel. It now has lots of good junk filtering stats.
I wish it had a little email with it or something that explains the icons used, but it's pretty intuitive, all in all.
This addon really lifts the vail from just how junk filtering works and gives you control to feel confident in your filtering.
Still two things are needed to make FF junk filtering perfect ..
1. A way to delete problem junk tokens.
2. The junk button needs to change to a thumbs up/thumbs down drop down button. This will encourage you to easily mark emails as "not junk". This is just as important as marking others emails as junk IMO.
This is one sweet addon that I won't be without from now on.