Sobre el certificado PKCS #12

Una FAQ al respecto.
Es el certificado que hay que usar para exportar de IE e importar con el Firefox.
Para exportar te indican: Make sure the Enable strong protection (requires IE 5.0, NT 4.0 SP4 or above) check box is checked.
Para importar te indican:

• Supply the password you used when you created the PKCS #12 file.
• Make sure the Enable strong private key protection check box is checked.
• Make sure the Mark this key as exportable check box is checked.