Examine source code of Nintendo games

{
  "theme": {
    "images": {
      "theme_frame": "Firefoxcover.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#8ffff8"
    }
  },
  "version": "2.0",
  "name": "Nintendo games",
  "manifest_version": 2,
  "description": "My favorite games as a Fire Fox theme"
}