I was able to reduce my bookmarks from 1,581 to 534 by just getting rid of broken, obsolete and duplicates. That is a huge help for now going on to organize them into proper folders.

Looks like extension doesn't work

Couldn't find any actions to perform on all my duplicate bookmarks. Hence the whole thing felt completely pointless.

I checked the top of the list, the bottom of the list, the page header, the page footer...

This tool is fantastic. I have almost 2k bookmarks, and trying to de-duplicate and find old, dead bookmarks by hand is a huge pain. This add-on was able to identify several hundred bookmarks I could prune and made it easy to fix broken bookmarks I wanted to keep and remove dead bookmarks. Thanks Sören!

Simple et efficace. À utiliser régulièrement pour garder ses marque-pages propres. Merci.

Bis jetzt funktioniert alles bestens, Firefox läuft rund, sehr praktisches AddOn, endlich mal Ordnung im Lesezeichen-Dschungel. Manche schreiben vom Ordner, der nicht gefunden wird?! Ähm, Mozilla-Ordner suchen und gut ist.

This add-on takes over your cookies settings without telling you. Depending on how many bookmarks you have, this add-on might also freeze your browser for more than a few seconds.

Can't choice the folder.
Have to wait several minutes without possibility of using firefox.
Obtain an useless huge list (hard to find the folder you want to clean in this stupid list).

Nothing smart with this addon

First it needs to scan, then, in the results not shows the full path of bookmark(s) but it shows them at second scan, then, you have to delete unneeded bookmarks one by one(!), then, I needed to refresh (scan again) and then not working, It freezes.

Not working