title: How to install and configure geckodriver on Rails / Ubuntu
body: <p>I'm using Watir to scrape in production, but due to some firefox issues, it no longer is able to launch a browser (see here <a href="https://stackoverflow.com/questions/37800215/watir-webdriver0-9-1-no-longer-opens-an-instance-of-firefox">Watir Webdriver(0.9.1) No Longer Opens an Instance of Firefox</a>).  </p>
  
  <p>Gecko driver is here:  <a href="https://github.com/mozilla/geckodriver" rel="nofollow">https://github.com/mozilla/geckodriver</a></p>
  
  <p>How do I install geckodriver and configure rails to use it instead of the default firefox binary?</p>
  
  <p>Thanks for any help.</p>