Following the instructions on how to delete a single bookmark does not work for me. I refreshed Firefox thinking that would help, and I still can't delete a bookmark. I opened the URL that I want to delete, and when I click on the star, a blue star is created and moves to the icon to the right of the star. I click on the star again and get a dialog box with the URL showing and then click on "remove this bookmark" and nothing happens. The dialog box goes away and the URL is still listed in my sidebar.