Simple is hard. --Steve Lautenschlager

What is a User Agent?

Summary

A User Agent is a string that a web browser passes to a web server or website telling it what type of browser it is and what type of platform it's running on. It is not a reliable indicator since many browsers try to spoof others so that they won't be locked out from websites that try to require a certain type of browser.

Find out what your browsers user agent is saying about itself.