Nice and clean user interface, one extension that save time and do exactly what is intended to do ! Many thanks author.

The best

Simple and easy way to clean up the bookmarks. Find and clean duplicates, merge cuplicated folders and manage broken links is easy to do wiht this extension.

Firefox 76.0b7 x64, Microsoft Windows 10.0.18363.815 - OK

Super. Macht genau, was man erwartet. :-)

Super easy to use.
Worked great.

It would be nice to see the title, or where in my bookmarks the offending bookmark is located, for future improvement.

Funktioniert tadellos und ist sehr gut gemacht.

Very helpful time saving Bookmark organizing add-on, removing duplicate bookmark, merging duplicate folders. Thanks a lot for this. I wish Firefox had these features builtin in Bookmark library.

It actually does what it says, and what's needed. Unlike many other extensions like this, it works to combine trees of folders properly, and then to identify and remove all the duplicate bookmarks in each individual folder.
The addition of an excluded folders is a major bonus when dealing with external bookmark sync tools.