Here is a great tip from shashank on how to make Firefox 10 times faster.

1. Type “about:config” into the address bar and hit enter. Scroll down and look for the following entries:

2. Alter the entries as follows:

Set “network.http.pipelining” to “true”
Set “network.http.proxy.pipelining” to “true”

set “network.http.pipelining.maxrequests” to some number like 30. This means it will make 30 requests at once.

3. Lastly right-click anywhere and select New-> Integer. Name it “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.

Source

Time for some tips and tricks. Percy Cabello wrote a great article on how you can tweak your location bar. For example: make autocomplete menu show only typed addresses and not visited or bookmarked, how to change the number of suggestions displayed in the autocomplete menu and more.

If you want to play with Firefox 3 location bar a bit, this can help you a lot.