Rated 4 out of 5 stars

by TechyGizmos11 on اوت 4, 2026 ·

I appreciate the UI for reviewing the duplicates. My outlook sync and possibly BetterBird filters (with copy operation) caused a lot of duplicates. I realized that this add-on looks at all folders which is okay for some use cases. However, I purposely have emails in my inbox and other folders for organization purposes and because BetterBird/ThunderBird is not available for iOS yet. Copying emails to folders help viewing tagged/organized emails in iOS mobile. This add-on does not have the ability to search for duplicates only in the inbox (not sub-folders). Therefore, this add-on will identify emails stored in inbox and sub-folders. You can manually select the inbox instance and the sub-folder instance(s) if you wish but its tedious. I wish there was an option 'keep one copy per folder'. I suppose the first/last copy could be applied to all folders as well vs. just the first/last copy in the list.

**EDIT***: Developer has highlighted that the isolated duplicate search is possible by changing the extension settings (not within the GUI).

by Eyal Rozenberg (Developer) on اوت 4, 2026 ·

The removedupes extension _does_ have the ability to search only a folder without its sub-folders. You just need to check this box in the extension preferences dialog.