Full list of settings affected
setpref(BOOL,"content.notify.ontimer",true);
setpref(INT, "content.notify.interval",120000);
setpref(INT, "content.notify.backoffcount",15);
setpref(BOOL,"network.http.pipelining",true);
setpref(INT, "network.http.pipelining.maxrequests",8);
setpref(BOOL,"network.http.proxy.pipelining",true);
setpref(BOOL,"network.http.pipelining.firstrequest",true);
setpref(BOOL,"network.dns.disableIPv6",true);
setpref(INT, "nglayout.initialpaint.delay",0);
setpref(INT, "network.http.max-connections",60);
setpref(INT, "network.http.max-connections-per-server",24);
setpref(INT, "network.http.max-persistent-connections-per-proxy",4);
setpref(INT, "network.http.max-persistent-connections-per-server",2);
setpref(INT, "network.http.keep-alive.timeout",600);
setpref(INT, "network.http.request.max-start-delay",5);
setpref(INT, "browser.cache.offline.capacity",512000);
setpref(BOOL,"content.interrupt.parsing",true);
setpref(INT, "content.max.tokenizing.time",600000);
setpref(INT, "content.switch.threshold",900000);
setpref(BOOL,"config.trim_on_minimize",true);
setpref(INT, "ui.submenuDelay",0);
setpref(BOOL,"html5.enable",true);
setpref(INT, "content.maxtextrun",4095);
setpref(INT, "network.http.request.max-start-delay",5);
setpref(INT, "network.ftp.idleConnectionTimeout",150);
setpref(BOOL,"javascript.options.jit.content",true);
setpref(BOOL,"javascript.options.jit.chrome",false);
Feel free change values according to your needs, tastes and experience!
content.XXXXX. prefs affect the GUI responsiveness
network.XXXXXX. - are about using your connection