Examine source code of Naturalize

{
  "theme": {
    "images": {
      "theme_frame": "rainydayinsunny3.JPG"
    },
    "colors": {
      "frame": "#f5750c",
      "tab_background_text": "#f5bf7d"
    }
  },
  "version": "2.0",
  "name": "Naturalize",
  "manifest_version": 2,
  "description": "A call from Colombia to preserve our nature."
}