So, a friend said they couldn't get hotmail to work. In short, nothing that's based on javascript will do anything.
Running in private mode doesn't help, so it's not a cookie issue. Running in IE works, so it's not the computer or internet connection.
I've uninstalled Firefox, and removed all settings data, and installed the latest version, still no success.
Where should I go next? I'm not really sure at the moment. Maybe look at the error console? Everything on the PC is in Norwegian which makes things a little bit more challenging.