Review for Nostalgy by dreadnaut
Rated 5 out of 5 stars
An essential tool to move around folders and archive messages for those who like to keep their hands on the keyboard. Rules support makes the most common operations available with a single key.
One thing I could wish for would be the ability to (G)o to virtual folders, in particular the Unified Inbox!
To create your own collections, you must have a Mozilla Add-ons account.