I have been using Firefox instead of Chrome for a long time as with Firefox it is easier to navigate through my tabs (unlike Chrome that lumps them together -- you can't even see the title of each tab if you have say, 20 tabs) and the fact that firefox only loads tabs on demand -- which saves me a lot of lag compared to Chrome that loads all tabs when you start it. I'm an avid online shopper so I tend to open up close to 40 tabs per session/window for shopping, and then I would have another window open to do my work. Usually, I set my settings to 'Open tabs and windows from previous session' so I can open up my first window, then go to 'Recently closed windows' to open my second. It has been working perfectly, until today when my Firefox got updated. I would completely lose my first window no matter how much 'System restore' I did on my computer. (I close my windows in the sequence of second-first so that I can opne it the same way again) Is there a way to fix this problem? I would hate to lose my important tabs and it would be a hassle if I had to mix the two together.