Rated 4 out of 5 stars

Works great but there's one bug, I have two emails receiving the same email list, now I merged these emails and wanted to remove duplicates. However, using from/to as the selectors won't work, since one 'To' has "<list@host.com>" and the other "list@host.com". Don't know if this is common, but it took me a while to figure out since thunderbird displays both the same way, only when disabling 'to' and enabling 'cc list' to compare instead it grouped them together.

This review is for a previous version of the add-on (0.3.18b).