Doesn't play nice with Firefox Session Manager Rated 2 out of 5 stars

This extension seems to have serious problems. No matter what I do with my original window, it keeps trying to force me to create a new windows when I press ctrl-T to make a new tab, and no matter how many times I close that window it keeps popping up with all of the closed tabs reopened. (As well as any other way of opening a tab, like clicking an email link or opening a link in a new tab from the old window.) Basically there's no way to get rid of its tabs, even if I close all but one I can't close the last one, and if I close the window on that last one, it'll still be there when the window pops up again. I have dozens of tabs already in the old window, I'm not going to delete them all for one extension. Such a major problem out the gate means I can't even be bothered to keep it, even though it seems like it could have been useful.

This review is for a previous version of the add-on (0.14.2012122901.1-signed). 

I couldn't reproduce such a problem on my environment. Could you explain how to reproduce it with a clean profile? And, this issue should be tracked on the issue tracker on GitHub: