code: public static WebDriver getFirefoxDriverWithExistingProfile(
  			final String pathToProfile) {
  		FirefoxProfile profile = new FirefoxProfile(new File(pathToProfile));
  
  		return new FirefoxDriver(profile);
  	}
docs: Returns a new WebDriver instance and loads an existing profile from the
  disk. You must pass the path to the profile.
  
  @param pathToProfile
  the path to the profile folder
  @return a new FirefoxDriver that loads the supplied profile