Developer reply by Standard8
Rated 4 out of 5 stars
Helps me to keep my long mail threads under control and specially find the mails sent/received a while ago.
This add-on is the reason I can't move yet to Thunderbird Supernova. When will it be available for Supernova ?
Conversations was updated for Supernova a few days ago, before your review.
To create your own collections, you must have a Mozilla Add-ons account.