I have a new Windows 10 computer. I downloaded the bookmarks from Firefox on my old Windows 7 computer and uploaded them to Firefox on the new computer. I can see that the bookmarks are there, but they are not displaying across the top of my screen as they did on the old computer. I had many "categories" listed across the top, such as Music, Food, etc., with many bookmarks on the dropdown from each category. How do I get those categories to display across the top of my screen? Thanks for your help!!!