André,
Procurei no gogle "non block rule windows firewall" e obtive algumas respostas, dentre elas esta a seguir:
"A personal firewall (e.g., the Norton firewall and ZoneAlarm) is a security program that controls access to the Internet. The firewall may be a freestanding program, or it may be part of an Internet security package. A firewall can also be implemented in a separate hardware device.
After your Mozilla application is installed or updated, your security software must be configured to allow Internet access. This may happen automatically, or you may have to do it. If you deny access, you must reconfigure the security software to allow access.
No Web browser or any other program can control the firewall. If it could, that would completely bypass the security of the firewall.
This article provides general information about software firewalls as well as information about specific firewall programs. For information about other security programs, including antivirus programs, that can can block internet access or cause other connection issues, see Error loading websites."
extraido do link:
http://kb.mozillazine.org/Firewalls
"A mente que se abre a uma nova idéia jamais volta ao seu tamanho original." (Albert Einstein).