Review for Account Colors by Kaengu
Rated 5 out of 5 stars
Well, have been living without this great addon for a few months now for obvious reasons, and it has turned out to be completely irreplacable. Working with multiple accounts has become tedious and error-prone, it's a shame that there is apparently no way to bring back the clear color-coded arrangement of messages. None of the proposed alternatives can be used instead to mimic any of the core functionalities of Account Colors, they don't even come close. A giant thank you to the developer for providing such a great tool for so many years! And hopefully there will be something similar in the future.
To create your own collections, you must have a Mozilla Add-ons account.