Examine source code of cookie cat

{
  "theme": {
    "images": {
      "theme_frame": "COOKIE4.jpg"
    },
    "colors": {
      "frame": "#82817b",
      "tab_background_text": "#5e5b5b"
    }
  },
  "version": "2.0",
  "name": "cookie cat",
  "manifest_version": 2,
  "description": "for my pretty little cousin :*"
}