AM-DeadLink is a useful application that can detect dead links and duplicates in your browser bookmarks.
If a Bookmark has become unavailable, you can then verify it via the internal preview and delete it from your browser. Additionally, you can download/update the FavIcons of all your Favorites from the Browsers Internet Explorer and Opera.
AM-DeadLink only checks your browser bookmarks and bookmark lists for valid/invalid URLs.
AM-DeadLink is capable of checking URLs from the following:
Starting with AM-DeadLink 4.7, it's no longer possible to change or delete bookmarks from your Internet Browser. Browser bookmarks should only be deleted within the browser user interface, not via external tools.