Easy to use and intuitive. Not found any errors. (October, 2018)

Developer did a good job, this extension works well. I got rid of over 300 dead links and even more duplicates.

Very Helpful. The ability to delete the redirects is great. Additionally, the ability to review each bookmark and edit/delete/correct each and even double click to open in a new tab (to copy the home page addy and edit the bookmark) is a great tool. The one I had in prior FF versions basically only offered bulk delete options. Vielen Dank!

用起来很不错，很多功能考虑到了

Не ожидал, что такое удобное дополнение найдется. Закладок у меня больше 1000. Очень просто и быстро нашел «плохие» закладки, дубликаты и др. Очень кстати – русский интерфейс. СПАСИБО!

Very useful and easy to apply on a historical grab bag of links

Very good. Can detect 404 bad link, redirect link and others non HTTP 2xx.

I hope that it can be improve to detect web content changed.
For example: the bookmark title is about photography, the content was about that in 10 years ago but now the domain had changed the owner and URL still exists but content is something about anything else, no more photography.

very good add-on
though it may takes some time to check bookmarks.
ed: dev's replied with logical reason. stars up to 5.

Hello,
I am French.
I am using Firefox Quantum v61.0 (64 bit) under Windows 10 64 bit Family v1803.
I have tested and apreciated your existing Bookmaks Organizer extension in French. He helped me sort through my 1096 bookmarks.
I would like to suggest an option: A button to show / hide the contents of the complete tree of Firefox bookmarks.
Indeed, when I reinstall Firefox or I install the update, the side pane of the bookmarks only displays the folders, and you have to open them manually to display the contents.
It's tedious.
Thank you.

Hat alles was ich brauche. UND ist gratis! Danke an den Programmierer

Another killer browser add on!

Works well, no duplicates or broken bookmarks anymore!

One of the best bookmark organizers.

Do its job and simple to use.

I had a similar experience as Loquacious1 and Anonymous user 436dc3. I installed Bookmarks Organizer and the first time I ran it, the three balls kept cycling. The second time I tried, it ran to completion. However, the check bookmarks remained greyed out and it was unresponsive.
I uninstalled the Add-on. I downloaded the Add-on again. I reinstalled. It runs fine.
Can't say that this was the first time that a reinstall cleared up the problem. Been around since the NCR 300 series...