For connoisseurs, especially site administrators, a visitor whose browser is identified with User Agent : Mozilla / 5.0 (compatible; Googlebot / 2.1; + http://www.google.com/bot.html) , Googlebot / 2.1 (+ http://www.google.com/bot.html) si Googlebot / 2.1 (+ http://www.googlebot.com/bot.html)Suggest a visit muzzle / crawler of the Google search engine.
A regular user has a user agent given by the browser from which they access the site. In the case of someone using Opera Browser, the user agent is: Opera / NOTHING (Windows NT NEVER; U; en) Presto / 6.1
Testing SafariI noticed a very interesting thing built into the browser. Possibility of change user agentYour liking. Even allows you to set a user agent similar to that used by Googlebot.
All you have to do to change your User Agent is to install Safari, go in menu Develop -> User Agent -> Other ..