title: How can I load a local json file?
body: <p><strong>Is there a way to configure firefox using about:config to allow local file access (for demo purposes)?</strong></p>
  
  <p>Specifically using FF12, I need to be able to have local file access to json data. It runs fine on a server, but I'd like to make this demo more portable. </p>
  
  <pre><code>        $.ajax({
              url: "../_assets/levelschema.json",
              complete: function (data) {
                  Levels = data.levels;
                  //...
              },
              success: function (data) {                    
                  // wont get called b/c files don't have 200 HTTP status
              },
              async: false
          });
  </code></pre>
  
  <p>I've tried setting it to not async=false, but I get a "Access to restricted URI denied" error. This is a security feature. I really need the demo to work offline, without internet access, and I'd prefer the people using it not have to install a web server. I'd also prefer not having to embed all my data in the HTML tags since that data subject to change.</p>