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CloseReview for Remove Duplicate Messages by Dominic8603
Rated 5 out of 5 stars
Thank you for developing this! I accidentally copied thousands of emails to an archive twice and was not looking forward to deleting them one-by-one. You saved me so much time.
This review is for a previous version of the add-on (0.4.1).To create your own collections, you must have a Mozilla Add-ons account.