No, this is not part of some super secret spy novel, switching your “user agent” is kind of like changing the brain of a browser. I have found a good tutorial to help you get the most out of changing Firefox’s into something else right here:
Recently my bank made some changes to web based banking facility. It is now IE only site for netbanking. They have coded site such way it only works with IE and do not work with Firefox browser. So I need to change the ‘user agent’ field in the Mozilla web browser to make it “look” and “act” like Internet Explorer (IE).
Luckily Google pointed out to a user agent switcher that is written as an extension to Mozilla products.