title: Use external browser to view matlab help pages
body: <p>On a Linux machine I want <code>Matlab 2015a</code> to use Firefox instead of the (buggy) internal browser as help browser when running <code>doc COMMAND</code> or pressing <code>F1</code>. </p>
  
  <p>How can I configure this in a <code>startup.m</code> file?</p>
  
  <p>I can not see the suggested browser option in 2015a preferences:</p>
  
  <p><img src="https://i.stack.imgur.com/rqzo6.png" alt="screenshot of MATLAB Help Prefs"></p>