Puntuado con 4 de 5 estrellas

Somewhat intuitive and needed extension. But do not get too used to it. Firefox is testing identical build-in functionality right now in 5.0 beta. And it looks better than this extension.

Esta valoración es de una versión anterior del complemento (1.3.1-signed). 

The built-in functionality in future Firefox versions is only for the default settings for those, not for managing all the detailed data.