Review for Remove Duplicate Messages by drenzyme
Rated 1 out of 5 stars
I have a POP account with a lot of email in it. Something got fouled up and most of the email was either duplicated or triplicated. This add-on will not remove the 20,000 unwanted duplicates. It dies as soon as I click on "Delete Selected" button.
To create your own collections, you must have a Mozilla Add-ons account.