Rated 4 out of 5 stars

If not for the pop-up javascript window every time I click on a message header, this would be a very useful addon. If it were possible to set it to run silently whenever it doesn't encounter an error, it would be worth five stars, but for it to pop up a Javascript window every time it checks flags on a header is enough of an annoyance to lower my rating.

This review is for a previous version of the add-on (0.8.1).