Review for Gmail Manager by namhsoy
Rated 3 out of 5 stars
If you want to grab 0.5.5, go to developers site (longfocus.com/firefox/gmanager/). He still has that old version up. :D
This review is for a previous version of the add-on (0.5.7).To create your own collections, you must have a Mozilla Add-ons account.