Generally if someone links a Youtube video I'll watch it in a private window so Youtube doesn't trash my recommended videos with 100's of videos of the video I just watched so I opened a video in a private window...one video lead to another and another and before I knew it I had 6-7 tabs open in this private window. I planned on restarting Firefox as it had been open for over a week and was using like 2-3gigs so while I had this private window open I decided to close my main Firefox window (with all the tabs) and continue watching a video in the private window and after 30-40 minutes I finally close the private window and reopen Firefox...all my tabs are gone from my main Firefox window, I probably had like 30 tabs open of various things. There is nothing listed under recently closed tabs/windows so restore all tabs/windows does nothing. This has to be a bug or something...I had no idea if you closed your main Firefox window and continued browsing around in a private window and eventually close it that every tab you had open in your main Firefox window would just magically disappear, is there anyway to restore the tabs or an old session? (my Firefox version is 84.0)