title: Jenkins build fails & browser does not launch on linux but runs on local machine
body: <p>I can successfully run my selenium webdriver tests from my local machine(WindowsA), I now want to run my tests using Jenkins (machine B). For my webdriver Tests I see the following output from Jenkins </p>
  
  <pre><code>org.openqa.selenium.WebDriverException: 
  Failed to connect to binary FirefoxBinary(/usr/bin/firefox) on port 7055; process output follows: 
  Error: no display specified
  </code></pre>
  
  <p>I've made sure browser and and selenium versions match. I  think this is an issue with my Jenkins(linux) machine. I have <code>Xvfb</code> on my linux machine also. I've read articles mention the browser maybe running in HEADLESS mode but seeing as other people are using Jenkins I am cautious before making any changes.</p>