Very frustrated with browser closing and not saving my tabs. Just got a brand new laptop and had everything set up but when I shut down system overnight, this morning I booted up and nothing was saved in Firefox!!!! HOURS of work wasted. So I again spent all morning doing it all again. Just now -- my browser closed automatically in the middle of work I was doing and everything disappeared again. I have been a LOYAL user of Firefox for years but I'm not doing this again. I despise all other options but need urgent help NOW to guide me through. Is it this Private Browsing? thing that showed up I didn't choose? How do I get rid of it? I'm a novice online but can be taught. Waste of my life and time....