Didn't backup the # of sessions I asked Rated 2 out of 5 stars
I set it to backup the last 10 crashed sessions. Upon crashing 3x in a row, I went to restore my initial session. I found it only had backed up the last crashed session. I've now lost over 50 links and will need to sort through thousands of links in "History" to find them. Yay!
EDIT: Thankfully the TabsGroup add-on I have automatically backs up some sessions by default, which means I at least have not lost all those links. However this bug is still present and should be addressed!