Examine source code of pookiwin

{
  "theme": {
    "images": {
      "theme_frame": "Pooki.jpg"
    },
    "colors": {
      "frame": "#97aec7",
      "tab_background_text": "#f1f2d3"
    }
  },
  "version": "2.0",
  "name": "pookiwin",
  "manifest_version": 2,
  "description": "little cat watching the rain"
}