Speed Up Firefox

1) Open Firefox, then type "about:config" (without quotes) in the address bar and press enter.

2) If any message box apears in front of you please continue.

3) In the firefox window you will see so many configuring options of firefox. From these options set the following values 

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network.http.pipelining                             true

network.http.pipelining.maxrequests      30

network.http.proxy.pipelining                 true

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4) Restart Firefox and feel the difference.