Review for Thunderbird Conversations by Graham Poulter
Rated 3 out of 5 stars
Provides a great conversation view, just like GMail.
But it has one Fatal Flaw: that default button says "reply all", and you have to click on the down arrow to get "reply". This is terrible, I just replied-all to 200 people on a company mailing list. Mistakes happen, and I will have to uninstall the addon if it doesn't help me prevent them.
Please go back to separate "Reply" and "Reply All" buttons.
To create your own collections, you must have a Mozilla Add-ons account.