title: Selenium 2 cannot find Firefox profile
body: <p>In selenium 2 in a Grid setup I'm using this to try to load a profile called 'protractor':</p>
  
  <pre><code>-Dwebdriver.firefox.profile=protractor
  </code></pre>
  
  <p>This doesn't work, I get this error:</p>
  
  <pre><code>UnknownError: Firefox profile 'protractor' named in system property 'webdriver.firefox.profile' not found
  </code></pre>
  
  <p>If I start Firefox with the -p argument and protractor, like this:</p>
  
  <pre><code>firefox -p protractor
  </code></pre>
  
  <p>It does work. What might be going wrong here?</p>