This article applies to users with McAfee 2010-2011 products on Windows XP, Windows Vista, and Windows 7. For instructions on configuring other security software, see Configure firewalls so that Firefox can access the Internet.
After updating or installing Firefox, the firewall included with McAfee may erroneously prevent Firefox from accessing the Internet.
In order to fix the problem, you must update McAfee Security Center and reset its firewall settings.
Follow these steps to reset McAfee's firewall settings to ensure that Firefox is able to connect.
If McAfee hasn't been updated today, follow these steps to make sure you have the latest update.
If Firefox will not connect to the Internet after configuring McAfee with the instructions above, you may have another problem. Read Firefox can't load websites but other browsers can for instructions on how to troubleshoot this.