Examine source code of Wartburg Eisenach

{
  "theme": {
    "images": {
      "theme_frame": "wartburg2-oben.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#f0f0f0"
    }
  },
  "version": "2.0",
  "name": "Wartburg Eisenach",
  "manifest_version": 2,
  "description": "Die Wartburg in Eisenach bei Nacht"
}