Use with '''Extreme Caution;''' '''[https://addons.mozilla.org/en-US/firefox/addon/bookmark-duplicate-cleaner/ Bookmark Duplicate Cleaner]''' {web link} Scans for bookmark duplicates and allows you to delete them '''[https://addons.mozilla.org/en-US/firefox/addon/bookmarks-checker/ Bookmarks Checker - check for bad links]''' {web link} Check favorites for broken or bad links. It checks for bad links and displays a report if it finds something. Check for 404 links, timeout links.

You can check for problems with the <b>places.sqlite</b> database file (bookmarks, history) in the Firefox profile folder. *Places Maintenance: https://addons.mozilla.org/firefox/addon/places-maintenance/ See also: *http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox *https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file