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CloseReview for QuickFolders (Tabbed Folders) by thirdwalrus
Rated 5 out of 5 stars
I've been using this add-on for several years now and find it extremely useful for keeping my email organized. I'm a heavy user of filters, folders, and sub-folders and having color coded tabs for my most used groups of email is essential. And it keeps working consistently, release after release.
This review is for a previous version of the add-on (4.7.1).To create your own collections, you must have a Mozilla Add-ons account.