Examine source code of Urknall

{
  "theme": {
    "images": {
      "theme_frame": "Explosiv111.jpg"
    },
    "colors": {
      "frame": "#f20909",
      "tab_background_text": "#2d0b8c"
    }
  },
  "version": "2.0",
  "name": "Urknall",
  "manifest_version": 2,
  "description": "Energie dehnt sich explosiv aus"
}