Excellent Rated 5 out of 5 stars

Love this extension! A must have if you have more than one email account and/or use the Unified Folders view.

My only suggestion would be to have a convenient default for some settings. It was confusing when nothing happened after choosing a background color on all my accounts, then to find out I had to mess with the "Color ... Background" checkboxes in the options in order for it to be applied.

This review is for a previous version of the add-on (3.3).