Use your own custom FavIcon for your app 

If you'd like to use your own Favicon you can do so with some custom Javascript. 

  1. Go to Settings
  2. Click on Custom Header Code
  3. Paste in the following code: 
(function() {
    var link = document.querySelector("link[rel*='icon']") || document.createElement('link');
    link.type = 'image/x-icon';
    link.rel = 'shortcut icon';
    link.href = '';

Replace the 

'' with the URL of your icon.