Ok, other than utilites you can download ths may help. After a look around the internet i found a few different things to do to boost firefox, there was quite alot of different things i found. This short tutorial is by far the best, its quick easy and really does work!
Load up Mozilla Firefox. Now, in the address bar, type “about:config” (Without the ” ” of course).
Next, scroll down look for the line that says "network.http.pipelining" use the search of course to get to it quick, and double-click it. Set it to "True"
Now, scroll down and look for "network.http.pipelining.maxrequests" Once you have done this, double-click it, and a box will pop up. Change the number to 60.
Thats it restart Firefox and see if you notice a boost of around 10-40%
Load up Mozilla Firefox. Now, in the address bar, type “about:config” (Without the ” ” of course).
Next, scroll down look for the line that says "network.http.pipelining" use the search of course to get to it quick, and double-click it. Set it to "True"
Now, scroll down and look for "network.http.pipelining.maxrequests" Once you have done this, double-click it, and a box will pop up. Change the number to 60.
Thats it restart Firefox and see if you notice a boost of around 10-40%