Perfectly works as intended. Can't thank the creator enough! Deleted my copied bookmarks AND my empty bookmark folders!

This superb tool got my bookmark collection out of a huge mess – a snarl that, as it turned out, contained some 15,000 duplicates, most of which were created by forces unknown to me (presumably bookmarks synchronizers) and a few by my own fumbling. To untangle this snarl, I had to use the tool's "expert mode" and get some help from Martin Väth, its creator, whose assistance was very clear and correct (as is his published documentation of the tool).

If you are getting stuck on "removing bookmarks" or any other action, then make sure to update firefox to the latest version or restart the browser. That fixed it for me! Great extension, solves my problem in a really elegant solution!

Amazing extension that does exactly what it says!

Easy and effective.

This is by far the best bookmark manager. It finds duplicates with a single click, then offers options to select them (another click can select all duplicated bookmarks, except the first, and one more can remove the rest, couldn't be any simpler!) What's best about this extension is not even the options: while others do whatever they were supposed to do silently, keeping one wondering if they're working or just failing and crashing quietly, this one shows a nice progress bar! It also has an advanced filter mode that can go beyond exact duplicate finding.