mozilla.cfg

//Firefox Default Settings
//set proxy server settings
 pref("network.proxy.ftp", "proxy.server.local");
 pref("network.proxy.ftp_port", 3128);
 pref("network.proxy.gopher", "proxy.server.local");
 pref("network.proxy.gopher_port", 3128);
 pref("network.proxy.http", "proxy.server.local");
 pref("network.proxy.http_port", 3128);
 pref("network.proxy.no_proxies_on", "localhost, 127.0.0.1, *.domain.intern");
 pref("network.proxy.type", 1);
 pref("network.proxy.share_proxy_settings", true); // use the same proxy settings for all protocols