I stole this from stark raving black's blog.
I started using Firefox a couple of years ago, partly because it was safer than Explorer but mainly because it was quicker, then Mozilla developed it further and added stuff that slowed it down, which was a pain but if you have broadband there is a way of making it quicker again. By doing the following I was able to speed up the page downloads by about 25%.
Here's what you do.
* 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.
If you still have dial up though, leave it as it is. I probably should have said that Firefox is by default optimised for dialup connections, at the beginning. Whoops!