About a week ago, I lost a very important browsing session due to my computer freezing and having to restart it. I then opened a new window the following day, once I was done, closed it. Now whenever I press the 'Restore Last Session" button on my home screen, Firefox always brings me back to the session I closed the day after I lost the one I'm trying to restore. It would be very difficult to try to retrieve this session by digging through my history and finding every individual tab, as there were far too many for me to remember, and they were opened on different days, meaning I would have to find each web page on the data it was opened in my history, and I don't remember all of the tabs that I had, meaning it would be impossible to know if I had found all of them.