Speed up Firefox 3 with these tweaks
1) Type the following address in the address bar:
about:config (and hit <enter>)
2) Double-click network.http.pipelining and network.http.proxy.pipelining. They will change when you double-click from a False value to True.
3) Double-click network.http.pipelining.maxrequests and change the integer value in the popup to 30.
4) Right-click anywhere in the list and select "New" followed by "integer". In the new popup box, enter "nglayout.initialpaint.delay", and set the value to 0 (zero) in the next popup box.
5) Double-click on browser.cache.memory.enable so it changes to True.
6) Double click on browser.cache.disk.capacity and change the value to 70000.
These changes should take effect immediately.
Enjoy faster FF3!