Very important and actual addon Puntuado con 5 de 5 estrellas
From my point of view it has friendly interface and I don't understand the claims to it. А fortiori taking to account that this addon is not aimed t frequent usage - it makes its job once and good. Next time it would be invoked after few months or even years, not earlier.
I have only one proposal.
Currently http://www.some_site/ and http://www.some_site it recognizes as different bookmarks due to last "/", although they are always the same url.
Is it possible recognize such bookmarks as duplicated?