Review for Thunderbird Conversations by Schattenspieler
Rated 3 out of 5 stars
Though TB looks more organised with this addon, I end up with an empty Inbox. Don't know if it's because several accounts go into it already or because I'm using both POP and IMAP accounts. So I had to disable it, to read my mails again. :(
This review is for a previous version of the add-on (2.6.3).To create your own collections, you must have a Mozilla Add-ons account.