Puntuado con 5 de 5 estrellas

Perfect. Makes everything clear: Toolbar text, buttons etc. Liiiiike it! I use it!
Update (Aug 2013): Don't use it anymore. Don't remember why.

Puntuado con 5 de 5 estrellas

That's funny, but this one is my favourite theme for FF ever. I just can't work in FF without clear transparent glass theme. =D
Thanks for such a simple and pleasant theme!

Puntuado con 4 de 5 estrellas

Simple, to the point. Like this a lot!