Rated 4 out of 5 stars

I hope it will be adapted to the new API. Sometimes I have the problem that my browser becomes completely unresponsive for a minute or more because it needs to reallocate memory or something like that. I then frantically click on the close button which takes ages too to react. Firefox then closes with a crash and the next time I open it, Session Manager shows me the latest saved entry as completely blank with zero tabs in the list. Of course older entries are missing some tabs which I opened since then...

This review is for a previous version of the add-on (0.8.1.13).