Please help me, I also installed Windows7 and Windows10 on my computer At Wndows10, (64), when I wanted to open Firefox, I was forced to create a profile (please excuse me, I don't even know what a profile is) and either I wrote there or I didn't write anything. Firefox opened. After several attempts it opened, to see that all my bookmarks were deleted. If I knew, let me be saved! I had important addresses there. Please tell me how I can recover them. Post script: I don't speak English and I have to translate with Google translate, Thanks for understanding.