Just fine here with Firefox 16.01 Puntuado con 5 de 5 estrellas

After having installed protocol 'Microsoft TCP/IP Version 6' from within XP-SP3, even though I remain at this time IPv4 restricted, SixOrNot allows me to discover when a website is "IPv6 ready". Not to mention "information about all the domains contacted in order to load the page" (which is my first motivation). Nice.

Esta valoración es de una versión anterior del complemento (