All of a sudden, I can no longer open new tabs in Firefox just by clicking the top bar (sorry, don't know how to describe this: the space that sits just below the line with 'File', 'Edit', 'View', 'History', etc. (Menu bar?) Formerly, when I had a tab open I used to be able just to click that line and a new tab would open. To open a new tab now I have to look to the right of the screen, and press the '+' button (Open a new tab Control+ 1) that appears in that same area just below the that is there. Not nearly as convenient. Please tell me how to fix this as simply as possible (I am not very computer literate). I have done nothing to change anything in the Firefox settings, so don't know why this happened all of a sudden. Very frustrating. My bookmarks all disappeared too, by the way, thoughI figured out how to resstore them to top of screen. I am using Windows 10 Thanks in advance, A frustrated Cynthia