To really enhance the browsing speeds in firefox do the following. After this small hack I feel its faster than Chrome, you can do and check for yourself.
1. Type “about:config” into the address bar and press enter (yeah its there!). Scroll down and look for the following entries:
Normally the browser will make one request to a web page at a time. When you enable pipelining it will make several at once, which really speeds up page loading.
2. Alter the entries by double clicking on them
Set “network.http.pipelining” to “true”
Set “network.http.proxy.pipelining” to “true”
Set “network.http.pipelining.maxrequests” to 30.
This means it will make 30 connection requests at once.
3. Lastly right-click anywhere and select New-> Integer
Copy-paste the variable “nglayout.initialpaint.delay” and set its value to “0″.
This value is the amount of time the browser waits before it acts on information it receives.
voila!!, the firefox is faster now, try opening a really heavy page with images etc. (like yahoo music), you will notice the browsing is much faster now.