I’m sure anyone who has used Firefox 2 remembers Fasterfox, an addon that increased your connection speed to servers on the net. However, the addon creator still has not updated the addon to work with Firefox 3. Someone designed a modified version of Fasterfox to work with Firefox 3 however, so Fasterfox is back for the masses. If you are worried there is a virus in the addon, you can view the virus scan results. The addon is completely unchanged other than being compatible with the greatest version of Firefox yet, and here is a download link for it:
Update: I modified the file to work with version 3.6.* of Firefox.
To install the addon, just drap the xpi file (the only file) onto any part of the Firefox window, then you will see the normal addon installation steps.