title: Not able to open the browser in ubuntu?
body: <p>I am using selenium framework for testing.
  In the beginning I was using Windows machine, in that I have used Mozilla Firefox 39.03 and selenium 2.44.0 . Currently I have changed windows OS  to Ubuntu  , but the same version is not working here. I am not able to open Firefox browser while execution.  Is there any version compatibility  in Ubuntu ?</p>
  
  <p>Please suggest something .</p>