Try these new settings with 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.To change the entry, double click on it.

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.If you have dial-up, set it to 15.

3. Lastly right-click anywhere and select New-> Integer. Name it "nglayout.initialpaint.delay" and set its value to "0" without the quotes. This value is the amount of time the browser waits before it acts on information it receives.

Do not set any of these values over 30 otherwise admins will ban you from their sites for opening too much requests on their servers.