title: Firefox marketplace: manifest file validation
body: <p>I am trying to submit an app as packaged app to the firefox marketplace. The code is hosted on github at the address <a href="https://github.com/dacapito/ebac/" rel="nofollow">https://github.com/dacapito/ebac/</a> .</p>
  
  <p>When running the manifest validator I get the following errors</p>
  
  <hr>
  
  <p>Your app failed validation with 2 errors.</p>
  
  <ul>
  <li>JSON Parse Error
  <h2>   *  Manifests must be served with the HTTP header "Content-Type: application/x-web-app-manifest+json".</h2></li>
  </ul>
  
  <p>and looking to the error details:</p>
  
  <hr>
  
  <ul>
  <li><p>Error: The webapp extension could not be parsed due to a syntax error
  in the JSON</p>
  
  <p>No JSON object could be decoded: line 2 column 1 (char 1)</p></li>
  </ul>
  
  <hr>
  
  <p>I have tested my manifest file with a json validator and it gave no problems. And moreover the very same app was submitted to the marketplace as a packaged app and the validator gave no problems at all..</p>
  
  <p>Could it be a server trouble (not serving the file with the correct content) or what else ? </p>
  
  <p>regards </p>