From our work mailing list:
Here's something for broadband people that will really speed up
Firefox:
1.Type "about:config" into the address bar and hit return.
Scroll down and look for the following entries:
network.http.pipelining
network.http.proxy.pipelining
network.http.pipelining.maxrequests
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.
2. 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.
3. 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!