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CloseReview for Remove Duplicate Messages by nbi
Rated 5 out of 5 stars
Works fine in TBird 68.10.0. Just select the folder, right click, and choose "Remove Duplicates". Doesn't get any easier. Don't know why people are having problems.
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.