title: How to use a already opened firefox for testing in Selenium
body: <p>This declaration</p>
  
  <pre><code>WebDriver driver = new FirefoxDriver();
  </code></pre>
  
  <p>always opens a new instance window of Firefox. It doesn't use the already opened firefox.</p>
  
  <p>Can anyone let me know how to use a already opened firefox for testing instead of opening a new one?</p>