Firefox 5 Hidden Extension Redirecting Google Searches to Spam Website

Using GooredFix, I was able to remove a malicious Firefox extension. This extension is not all over the internet currently, but apparently present to the few websites I visit each day. It installs without permission and causes every other clicked Google search result to redirect to a fake search engine site.

Deleting HKEY_LOCAL_MACHINE\Software\Mozilla\Firefox\Extensions\\{EFB5AF1A-EB6E-4A28-AEF7-FDD4FBB4B353} -> Success!
Deleting C:\Documents and Settings\Administrator\Local Settings\Application Data\{EFB5AF1A-EB6E-4A28-AEF7-FDD4FBB4B353} -> Success!