That's really strange. Firefox's "native" separators do not have a location, and clicking them does nothing. Unless those were injected by an add-on, or imported from another browser (or Windows Favorites), it's very puzzling that you would have even one of them, much less many of them. My suggestion would be to delete all of those. If you open the Library window (Ctrl+Shift+O as in "Organizer"), you can type or paste ''separatethis'' in the search box at upper right to isolate those bookmarks for bulk deletion. If you need to insert normal Firefox separators first before deleting, then it's much more work tracking those down...