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CloseDeveloper reply by DW-dev
Rated 2 out of 5 stars
Please update it for the current version of Thunderbird!
This review is for a previous version of the add-on (11.1).ACCOUNT COLOURS NOW WORKS WITH THUNDERBIRD 68.0
Please see reply to Jaak Hillen above.
To create your own collections, you must have a Mozilla Add-ons account.