Examine source code of Random Cookie

{
  "theme": {
    "images": {
      "theme_frame": "Untitled.png"
    },
    "colors": {
      "frame": "#b80404",
      "tab_background_text": "#e0b92a"
    }
  },
  "version": "2.0",
  "name": "Random Cookie",
  "manifest_version": 2,
  "description": "Cookies are awesome"
}