Review for Session Manager by halpinker
Rated 4 out of 5 stars
Works quite well and the recently closed tabs feature is especially good for when you accidentally close something. One problem is when you load a session, it replaces what you have open. Wish there's an option to just open the saved session in addition to what you're looking at already.
This review is for a previous version of the add-on (0.6.1.13).To create your own collections, you must have a Mozilla Add-ons account.