Elevated privileges?

I only use Firefox Portable occasionally (usually use Chrome), but I had occasion to try to start it for the first time in a while on my work computer. I got a dialog box that stated that I was not permitted to run the application with elevated privileges (first time I've seen this). Why does it want to run with elevated privileges in the first place? Is this a configuration issue, and how would I go about investigating and fixing it if so?

Thanks,
Mike