FireFox got a feature called pipeline which can speedup things and you will be able to browse fasssssssster.
The thing about pipelining is instead of using the old fashion way of sending a request then wait for the response from web server then send the next request, you can just send up to 8 requests while the responses are on the way, that would speedup your browsing if you got a fast Internet connection (there will be no significant difference if you got low speed).
The only drawback (and the reason why it is turned off by default) is the possibility that some web servers might not like the pipeline behavior and therefore stop responding to your requests (break the web page), to this day I didn’t have any such problems (am I lucky or good?).
Here is what you need to do:
1) In address bar write “about:config” then click on “I’ll be careful, I promise!”.
2) In filter box type “network.http.keep-alive”, if Value is False double click so it become true.
3) In filter box type “network.http.version”, make sure the Value is 1.1
4) In filter box type “network.http.pipelining”, if Value is False double click so it become true.
5) If you are on proxy or you are not sure In filter box type “network.http.proxy.pipelining”, if Value is False double click so it become true.
6) In filter box type “network.http.pipelining.maxrequests”, double click and set the value to 8 (you can set it to any number between 1 and 8).
That’s it, wear racing gloves and feel the speed!