title: WebDriverError: Invalid Firefox preference value: network.http.phishy-userpass-length=255
body: <p>I'm trying to start a new test case via gecko driver (v0.15) with specific Firefox profile in Protractor 5.1.1. Following description was used to create the profile: <a href="https://stackoverflow.com/questions/42151372/error-typeerror-profile-gettemplatedir-is-not-a-function-when-set-firefox-prof">Set firefox profile protractor</a> </p>
  
  <p>When I start the execution via protractor configuration, I get following error:</p>
  
  <blockquote>
    <p>WebDriverError: Invalid Firefox preference value: network.http.phishy-userpass-length=255</p>
  </blockquote>
  
  <p>The same behavior for the preference <code>browser.download.folderList</code> reference. </p>
  
  <pre><code>firefoxProfile.setPreference("browser.download.folderList", 2);
  </code></pre>
  
  <p>Is there a workaround for this settings? I get a blocking popup, if the phishy-userpass-length is not set. </p>
  
  <p>Thanks!</p>
  
  <p>Regards,
  Waldemar</p>