Don't Forget to Block Prefetch

A few million users have installed the newest version of Firefox. By default, there's an interplay between Google and Firefox that can cause the first site returned in search results to be downloaded to the computer automatically (including any associated cookies). One new feature in Firefox is a scary warning message when you access its configuration menu. That message reads:

This might void your warranty!
Changing these advanced settings can be harmful to the stability, security, and performance of this application. You should only continue if you are sure of what you are doing.

To continue requires clicking a button that reads "I'll be careful, I promise!".

Ignore the juvenile wording and fear tactics, and follow these steps to Disable Firefox/Google Prefetch.