Some simple tweaks to speed up Firefox
This is old stuff, but I thought I should keep it here anyway.
a) Set "network.http.pipelining" to True instead of False. You can do this by having it highlighted and hitting "Enter" on your keyboard.
b) Set "network.http.pipelining.maxrequests" to a number between 1 and 8, preferably 8. This will make the number you chose of requests at once instead of the default 4.
c) Set "network.http.proxy.pipelining" to True instead of False. You can do this also by having it highlighted and hitting "Enter" on your keyboard.