Not working at this moment.

I would love to try this, but I am not psychic. WHERE are the directions? How do I use it to clean my bookmarks of dead links?

Kein Icon rechts oben, daher nicht zu gebrauchen.
Falles es über die Einstellungen eines gibt, ist es schlecht beschrieben!

This has to be the most broken add-on I've ever tried. Most of the buttons do "nothing", e.g. trying to import an OPML file, add a live bookmark etc all just do ... nothing.

After the first refresh of the livemarks, the refresh, doesn't work anymore. So this addon has no interest.

Bei mir aktualisiert das AddOn die Einträge einige Zeit nach der Einrichtung nicht mehr. Im Kontextmenür (Reload live Bookmarks) fehlt dann auch der Eintrag. In den allgemeinen Einstellungen (Your livemarks) sind keine URLs mehr aufgeführt.
With me the AddOn does not update the entries some time after the setup any more. In the context menu (Reload live Bookmarks) also the entry is missing. In the general settings (Your livemarks) there are no more URLs listed.
Regards, Michael

it works if you have 8,9 feeds but when I try to load my 90 feeds , firefox freezes and cpu consumption goes to 100%. I think the best solution would be to simply load the feeds when they're selected (lazy loading) not all at once trashing the whole computer . Unfortunately for now is not usable and I disabled the addon, looking forward for the next release though