Almost exactly what I have been looking for Rated 3 out of 5 stars

I have often wanted a way to quickly filter on the current sender or subject. This pretty much does it!

Some possible enhancements would be to have buttons instead of a right click menu choice.

I use Saved Searches a lot, so a Saved Search that magically learns of the last sender or subject would be slick too!

This review is for a previous version of the add-on (0.1.1).