You can speed up Firefox by making little changes to your browser configuration.
2) Double click on "network.http.proxy.pipelining" to change the value from false to true.
3) Double-click on "network.http.pipelining.maxrequests" and change the number to "48". This means it will make 48 requests at once.
3) Double-click on "network.http.pipelining.maxrequests" and change the number to "48". This means it will make 48 requests at once.
4)Then go to “network.http.proxy.pipelining” you’ll see “network.http.max-persistant-connections-per-proxy” and “network.http.max-persistant-connections-per-server”.Double click each line and change value to 8
5) Now right-click anywhere in the configuration and select "New" then "Integer".Then type nglayout.initialpaint.delay.Add a value, enter the number "0". This value is the amount of time the browser waits before it acts on information it recieves.
Video tutorial