Now click on network.http.pipelining so it changes from false to true
Do the same for network.http.proxy.pipelining
Now click on network.http.pipelining.maxrequests and set it to 30
Explanation : Normally the browser will make one request to a web page at a time. When you enable pipelining it will make several at once, which really speeds up page loading. Setting the maxrequests means it will make 30 requests at once.
Finally right-click anywhere and select New-> Integer. Name it "nglayout.initialpaint.delay" and set its value to "0". This value is the amount of time the browser waits before it acts on information it recieves.
Close down Firefox & restart. Your done. Enjoy faster loading pages.
Please dont set this if you are not on a fast connection
I've tryed this, and it seems to help a little bit on bigger webpages.