Firefox is behaving strangely after updating to Big Sur. At first, the program would open but would not display an open window. I was able to open a new window from the Firefox menu, and now a window opens automatically upon starting Firefox again (although it actually flickers 1 time upon opening.) But this issue seems to be solved. '''More importantly, my previous session did not restore after the update. And the tabs that I had open are not the ones that show under "recently closed tabs." Can anyone help me find these?''' (I do have this option selected in my preferences.) I believe that they are in my history, somewhere but that would be like looking for a needle in a haystack. Please help! Thank you.