Review for Duplicate Contact Manager by Gone Postal
Rated 4 out of 5 stars
I have a lot of entries where I have the same contact name but different e-mail addresses (contacts with similar names and contacts with more than one e-mail address). The add-on is flagging these as duplicates every time it is run. It would be really helpful if there was some sort of check-box to indicate to the add-on that these are acceptable duplications and not to flag them up in the future.
Apart from that it is a very helpful piece of work.
To create your own collections, you must have a Mozilla Add-ons account.