Examine source code of Gizart

{
  "theme": {
    "images": {
      "theme_frame": "gizart_persona.jpg"
    },
    "colors": {
      "frame": "#bfbfbf",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Gizart",
  "manifest_version": 2,
  "description": "Elegant blue tapestry and a peek at the wonderful art of Francesco D'Isa (with his permission) from gizart.com.\n\nThere are hidden treats!\n(you might need a 3000 pixels wide screen to find them ;-)"
}