title: Running firefox with extension enabled using selenium
body: <p>I am using firefox version-59.0.2 and selenium version -3.6.0 .my task is to run headless in firefox with extension enabled.I am able to do only one task at a time i.e either I am able to run headless or lunch firefox with extension but I am unable to do both at a time because both are not supported at a time in a specific jar .how to do so</p>
  
  <pre><code>System.setProperty("webdriver.firefox.bin", "C:\\Users\\rahul\\AppData\\Local\\Mozilla Firefox\\firefox.exe");
  System.setProperty(FirefoxDriver.SystemProperty.DRIVER_USE_MARIONETTE, "true");
  System.setProperty(FirefoxDriver.SystemProperty.BROWSER_LOGFILE, "/dev/null");
  
  FirefoxBinary firefoxBinary = new FirefoxBinary();
  firefoxBinary.addCommandLineOptions("--headless");
  FirefoxOptions firefoxOptions = new FirefoxOptions();
  firefoxOptions.setBinary(firefoxBinary);
  FirefoxDriver driver = new FirefoxDriver(firefoxOptions);
  
  String autoFilePath = "C:\\software\\autoauth-3.1.1-an+fx.xpi";
  FirefoxProfile profile = new FirefoxProfile();
  profile.addExtension(new File(autoFilePath));
   FirefoxDriver driver = new FirefoxDriver(profile);
  driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
  WebDriverWait wait=new WebDriverWait(driver, 60);
  driver.get("http://www.google.com");
  </code></pre>