This text will change style with every different browser (firefox, chrome, safari):

Testing

And here is the content of the generated CSS file:

/*  General CSS:  */
h1{
	text-shadow: 1px 1px 1px #000;
}
/*  END General CSS  */

/*  Browser Specific CSS:  */

/*  CCBot/1.0 (+http://www.commoncrawl.org/bot.html) */
/*  Detected User Agent:  version:   */