Click the menu button and select Settings. Click the menu button and select Options Preferences. In the Menu bar at the top of the screen, click Firefox and select Preferences. To check your connection settings in Firefox: If you connect to the Internet through a proxy server that is having connection problems, you will not be able to load websites.
For instructions on how to configure some programs, see the Configure firewalls so that Firefox can access the Internet article. In general, you should make sure your Internet security software is up-to-date and remove Firefox from your program's list of trusted or recognized programs, then add it back. Note: Some Internet security programs can block Internet access even when they are in a 'disabled' state.
