If you want to make FireFox a lot faster than it already is, it is very easy to do. In your FireFox adress bar, type in
about:config
and press enter. You should be prompted with a page that says you might void your warranty, ignore this page and continue.
You should see a very long list of of things, the two you should be concerned about are
network.http.pipelining
and
network.http.pipelining.maxrequests
Double click network.http.pipelining and enable it to be true.
Now go to network.http.pipelining.maxrequests and set it to 20.
Firefox should now be much faster. If it isn't, try lowering the maxrequest to somewhere around 10 because you might be overtiming your browser.