Examine source code of Fire Mario

{
  "theme": {
    "images": {
      "theme_frame": "SuperMario.jpg"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "Fire Mario",
  "manifest_version": 2,
  "description": "The new, updated version of Fire Mario, with better graphics!"
}