Just read this and thought you might be interested.
In about:config,
- Set "network.http.pipelining" to "true"
- Set "network.http.proxy.pipelining" to "true"
- Set "network.http.pipelining.maxrequests" to some number like 20. This
means it will make 20 requests at once (although I also read than 8 was
the max).
- 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.
On my Mozilla 1.7.8 with an ADSL line, the differences are noticable.