Some trick for Firefox 1.5

1st. On address bar type "about:config" and alter belows entries:

"network.http.pipelining" set to "true"

"network.http.proxy.pipelining" set to "true"

"network.http.pipelining.maxrequests" set to 30. Meaning 30 requests at once.

2nd. Select anywhere & create 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 recieves.

Good luck.