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Needs a sign-in on Google before running but gets most icons. Still worth 5 stars.

Sencillamente la mejor extensión que he probado para actualizar los marcadores, los favicons y eliminar url's obsoletas.

Enhorabuena al creador.
Muy recomendada!

Works just as described. Managed to retrieve the vast majority of favicons.

Firefox has some major issues with favicons right now but this is the closest I've got to sorting it out. It recovered a ton of them. It doesn't work on links that are no longer active (which makes sense), so some of the problem might be your bookmarks themselves.

old but gold!
478 bookmarks took 7:39 min

i work a lot with the bookmarks and sort them in directories. Also i often reinstall Windows and test some Linux distros, which means i also do often sync fresh Firefox/Waterfox instances.
The addon opens every bookmark in your current window (focus remains on your current tab and your opened tabs stay alive. maybe 5 proccessing bookmarks at a time)

Excellent overall, the only thing I spotted is that there is no way to disable the warning check for "canonical". Should there be an option to disable this function would be most helpful.

I recently converted from Chrome to Firefox after many years. I had 6097 bookmarks without favicons. After ~45min, I had favicons for the majority of them (the remainder were no longer working sites).

I would give this extension 6 out of 5 if I could. Just imagine updating 6000+ URLs one at a time !!!

Such a great, useful, minimal add-on. Thanks for your work!