I've come across a small utility to switch between an admin privileged account and LUP account when running IE on XP. Essentially, it is the same sort of function to that afforded by Internet Explorer "Protected Mode” in Vista. Clearly, there is a significant convenience upgrade to being able to jump between the highest and least user privileges at a whim. While that's great for those still using IE, this particular application is exclusive to IE. Can anyone point me in the direction of something similar for Firefox.