Type in the Address Bar; about:config

Then scroll over to the following settings and adjust:

network.http.max-connections :40
network.http.max-connections-per-server :20
network.http.max-persistent-connections-per-server :20
network.http.pipelining :True
network.http.pipelining.maxrequests :32
network.http.proxy.pipelining :True

All you have to do is double click on the line to type in the new number. It's not hard by any means. One you do that close your browser and reopen then start clicking around. Should almost double the speed
Duck