title: Rails Capybara selenium test on specific browser version and visualize test
body: <p>I am currently using Capybara selenium/webkit in functional testing, I don't really understand how it works behind the scene.</p>
  
  <p>By checking the Capybara document, the selenium by default is using firefox browser for testing. It doesn't even mention what is the version it is using. (I didn't install firefox, I think it came together with the gem <code>selenium-webdriver</code> or <code>capybara-webkit</code>)</p>
  
  <p>My question:</p>
  
  <p>1) If I want to trigger my test on specific browser version, is it possible? How can I do that? For example, on Chrome browser version 53.1.2.</p>
  
  <p>2) The automated functional test all conducted behind the scene, is it possible to visualize the testing procedure? For example, Selenium driver launch the browser and visualize the click/scroll/drag effect along with the test running?</p>