Worked for FF 52 Rated 4 out of 5 stars

Once I read the instructions to find the 'search' button under the addons listing, bing bam boom, duplicates gone. Very simple.

Superb Rated 5 out of 5 stars

This is one beautifully simple, useful and reliable add-on. Thank you.

Excellent Rated 5 out of 5 stars

Превосходно удаляет дубликаты закладок

Unbrauchbar Rated 1 out of 5 stars

Zeigt offensichtlich nur ein Duplikat. Aber nicht, wo er das andere gefunden hat. Somit hat man keine Möglichkeit richtig aufzuräumen. Ein intelligentes Programm zeigt alle Duplikatee und lässt einen wählen, was man löschen will!

ブックマークの名前やフォルダー名が表示されず、 URL しか表示されない Rated 2 out of 5 stars

列の幅を変更できないので、ブックマークの名前やフォルダー名を確認できない。

Excelente Rated 5 out of 5 stars

Hace lo que dice. Funciona muy bien.

Incomplete Rated 1 out of 5 stars

Looks like it found dupes BUT it doesn't wrap text (e.g. URLs) to columns it just expands the columns AND it doesn't allow horizontal scrolling so a long URL will push the folder column off the screen and you can't get to it. Further, you can't click column headers to order the results, so dupes from different folders often don't line up. This means the tool is only useful to delete short named URLs which are called the same thing in the same folder.
Since you can easily do that in the library view of bookmarks, there is currently no point to this tool. BUT it would be great if the dev could just add a few super basic bits of functionality.

Very handy, works well, no probs so far Rated 5 out of 5 stars

I like this FF add-on. I only wish it had boobularities & bodifications... it would make a cute li'l wifey.

A Good, Simple Tool! Rated 4 out of 5 stars

I just installed this add-on and it performed flawlessly helping me to get rid of 99 duplicate bookmarks.

My only other comment is that I was able to see the NAME of the bookmark and its associated URL, but I would REALLY LIKE to be able to see exactly which folder (among the many several I have created) that the bookmark is being removed FROM.

Ne marche pas chez moi (firefox 52.0) Rated 1 out of 5 stars

J'ai pu l'installer mais il n'apparaît ni un bouton ni un lien nulle part, même dans le gestionnaire de bookmarks...
Dommage car j'aurais besoin de faire le ménage...
Je vais chercher un autre add-on...

Well works Rated 5 out of 5 stars

In my case it program well works. 8252 double links were removed.

Doesn't Work For Me Rated 1 out of 5 stars

Have tried this multiple times; identifies duplicates but freezes every time I hit remove duplicates.

wow gret Rated 5 out of 5 stars

In 2 minutes I have found the plugin, installed it and removed the bookmarks duplicates. Simple and great add-on!
Thanx

How can I give this zero stars? Rated 1 out of 5 stars

The addon has a single button - Remove ALL, that's it. You cannot see where the duplicates are, which duplicates will be removed, or anything else. You can't even use this as a simple duplicate search because it just lists URLs but not the parent folders.

Great Rated 5 out of 5 stars

This is working

Does what it says although somewhat limited in options Rated 3 out of 5 stars

Does what it says, works.
But no ability to limit search to specific folder(s).

Management of the bookmarks to be deleted Rated 4 out of 5 stars

Super add-on, works best. A question: How to delete the NEWEST double bookmarks, you can control it somehow, so decide what to delete and what to keep?

Thank You! This Extension Is A Lifesaver! Rated 5 out of 5 stars

Just deleted 44K duplicate bookmarks in Firefox caused by iCloud duplications.

Doesn't remove folders... Rated 1 out of 5 stars

...which leaves a chaotic mess behind, I have thousands of empty folders with the same name and can't see which one contains links and which are empty. Totally useless if it can't remove deduplicated folders, I strongly suggest you don't use this tool if you have lots of them, you'll end up with more work than before...

Bookmarks Bar ? Which ones ? Rated 3 out of 5 stars

im searching an extension for clean my bookmarks ,
yes i think with firefox sync , i have now so duplicate bookmarks , so now its so hard to find the bookmarks i need ....
if anyone know an extention or something else please let me know thank you