Type about:config in the Address bar,Then look for the Following Entries and Make the Corresponding Changes:
•network.http.max-connections-per-server =32
•network.http.max-persistent-connections
•network.http.max-connections =64
•network.http.max-persistent-connections
•network.http.pipelining =True
•network.http.pipelining.maxrequests =200
•network.http.request.max-start-delay =0
•network.http.proxy.pipelining =True
•network.http.proxy.version =1.0
•Den,Right Click anywhere and select New--->Integer.Name it as nglayout.initialpaint.delay and Set its value to 0.This Value is the Amount of Time,De Browser Waits Before it Acts on Information it Recieves