Found this here. Good tweak for speeding upi Firefox on a broadband conection.
Try this “power-user” trick to make Firefox download pages faster by allowing multiple connections so it can download more than one file at a time. It’s only useful for broadband users, so if you’re still on dial-up you can just skip this one for now.
1.Type “about:config” into the address bar and hit return.
2. Scroll down and look for the following entries:
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.
3. Alter the entries as follows:
Set “network.http.pipelining” to “true”
Set “network.http.proxy.pipelining” to “true”
Set “network.http.pipelining.maxrequests” to some number like 30. This means it will make 30 requests at once.
4. Lastly 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. If you’re using a broadband connection you’ll load pages MUCH faster now!