Excellent, but it's currently broken Puntuado con 4 de 5 estrellas

As of December 20, year 2012, the latest version of Download Helper is not working on YouTube correctly, nor does it work correctly with a newer version of Firefox (18.0).

Esta valoración es de una versión anterior del complemento (4.9.12.1-signed). 

It looks ok to me. Can you provide details to bugzilla.downloadhelper.net ?