Bookmark Duplicate Cleaner is a simple Firefox add-on that detects duplicate bookmarks and allows you to delete them.
Simply click on the "Bookmark Duplicate Cleaner" option from the Tools menu and it will display a window with the duplicate bookmarks.
Bookmark Duplicate Cleaner is cross-platform and it works on Mac OS X, Windows and Linux.
· Firefox 4.0 and later
What's New in This Release: [ read full changelog ]
· Made window resizeable on all platforms
· Resizeable divider between the two lists
· Hopefully no more jumping user interface elements
· Changes to the bookmarks are reflected in the lists
· Added menu-items to the bookmarks menu and the bookmarks button