Examine source code of Limfjorden

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#bbff00"
    }
  },
  "version": "2.0",
  "name": "Limfjorden",
  "manifest_version": 2,
  "description": "The beautiful landscape of the Limfjorden, Jutland (Jylland), mainland Denmark. Pictures from the island of Fur, with a cow."
}