Review for Expression Search / GMailUI by kennyhoward
Rated 5 out of 5 stars
This is the best add-on for Thunderbird. I have used this ever since it came out. I have recently switched my Gmail settings to IMAP and was able to get the "Archive"(Y key) function to work by chaning the Archive directory to "[Gmail]/All Mail"(minus the quotes).
This review is for a previous version of the add-on (0.6).To create your own collections, you must have a Mozilla Add-ons account.