New version 3.0 has been released. Get it from AM-DeadLink - Download FavIcons and detect dead links in your browser bookmarks. Following is from the site:

AM-DeadLink detects dead links and duplicates in your Browser Bookmarks. If a Bookmark has become unavailable you can verify it in the internal preview and delete it from your Browser. Additionally you can download FavIcons for all your Favorites and Bookmarks.

AM-Deadlink works with Internet Explorer, Opera, Mozilla and Firefox.

AM-DeadLink is Freeware!