Examine source code of Super Mario Bros.nes

{
  "theme": {
    "images": {
      "theme_frame": "mariobros.header.png"
    },
    "colors": {
      "frame": "#050505",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Super Mario Bros.nes",
  "manifest_version": 2,
  "description": "My 10 year old grandson wanted to create a persona of his favorite game. Not bad for a first try, is it?"
}