Not working after upgrading to Firefox 22 Puntuado con 5 de 5 estrellas

Hi!
After updating to Firefox 22, Phony doesn't show anymore the list of the user agents available. The list is just empty.
This on HTC Desire Z. I don't have the same problem on Motorola Droid 4, though.

Esta valoración es de una versión anterior del complemento (3.6).