Examine source code of Rothenburg Forest

{
  "theme": {
    "images": {
      "theme_frame": "rothenburg2.jpg"
    },
    "colors": {
      "frame": "#9de8e6",
      "tab_background_text": "#010a00"
    }
  },
  "version": "2.0",
  "name": "Rothenburg Forest",
  "manifest_version": 2,
  "description": "This picture was taken just outside the walls of Rothenburg, Germany, in 2008."
}