I'm on a PC and trying to import my bookmarks from Chrome into Firefox. When I do it as instructed, it imports bookmark folders, but not the contents. So for example, if I had a bookmark folder in the bookmarks toolbar in Chrome, and called it "Sports" and filled it with a bunch of sports websites, and I imported that folder into Firefox, it imports only the "Sports" folder but the folder is empty and none of the sites contained in the folder carried over. How do I fix this??