Try this it will boost up the speed of your Firefox!!
First, type ” about:config ” into the Firefox address bar and hit enter. Just tell them that you will be very carefull. Scroll down and look for the following entries or just filter them
Next set 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.
Lastly 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 recieves.
Note
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This trick only works for broadband users not for dialup
Enjoy!! 
