Really nice Rated 3 out of 5 stars

This is cool, but would cool if was easier to perform search.
ie the Options on the Context menu are a long way down.
It may be way impossible to do, but the best option would be to have a icon-button to the left of the From and Subject fields (and maybe others) and this performs auto-search on that field and value.

This review is for a previous version of the add-on (1.2).