Examine source code of Plastikhaus

{
  "theme": {
    "images": {
      "theme_frame": "simpsons_big.jpg"
    },
    "colors": {
      "frame": "#876a6a",
      "tab_background_text": "#753d3d"
    }
  },
  "version": "2.0",
  "name": "Plastikhaus",
  "manifest_version": 2
}