Speed Up Firefox:

    If you have a broadband connection (and most of us do), you can use pipelining to speed up your page loads. This allows Firefox to load multiple things on a page at once, instead of one at a time (by default, it’s optimized for dialup connections). Here’s how.
        Type “about:config” into the address bar and hit return. Type “network.http” in the filter field, and change the following settings (double-click on them to change them)
        Set “network.http.pipelining” to “true”
        Set “network.http.proxy.pipelining” to “true”
        Set “network.http.pipelining.maxrequests” to a number like 30. This will allow it to make 30 requests at once.
        Also, 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 receives.

Via Hackforums.net