Recently my Firefox 4.0 auto updated to 5.0. After the install, all the previous kept bookmarks in the bookmarks toolbar have disappeared. I have attempted to restore my bookmarks using the JSON files I have stored, including one from the day before updating. When I attempt to restore them, either no bookmarks are loaded, or I am prompted with an "Unable to restore from selected file" error message. I am deeply frustrated by this, as this has occurred on my work terminal which contained a multitude of work required bookmarks, in the bookmark toolbar. Is there anyway to restore the bookmarks I have lost?