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CloseReview for Remove Duplicate Messages by Chris Rose
Rated 4 out of 5 stars
Love the add-on. However, most recent update seems to work only on top directory (hidden choking with the search subfolders option). Running fedora 33 w/ latest t-bird ( Thunderbird 78.11.0)
This review is for a previous version of the add-on (0.5.1b2).To create your own collections, you must have a Mozilla Add-ons account.