[darklajid]

What is a 'user program'?

If you're on a Linux machine the vast majority of people are going to use a package manager to install their software. It ends up in /usr not /home.

I don't get your argument. Sure, you ~can~ install to ~/bin (and I'd guess you could change the FF install path to something outside of UAC protection/virtual folder redirection, maybe even now), but the majority doesn't. Not on Windows, not on Linux. Or are you going to tell me that the gazillion Ubuntu users install FF to ~/bin? How are they updating their packages?

Right.. With a process that runs as root.