FF Settings menu, select, Startup, (Open previous Windows /tabs) is greyed out an not selectable. I adopted FireFox because I like the way that it operated. I could open FireFox and previous tabs and windows would open automatically. When I opened a new tab, FF would jump there automatically. If I wanted to check spelling, I could type in the search window and see correct options. ALL THAT IS GONE! Why should I keep using FF when it has lost functions that I depended upon?