Examine source code of winter in Sweden

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#7a9ccc",
      "tab_background_text": "#426eb8"
    }
  },
  "version": "2.0",
  "name": "winter in Sweden",
  "manifest_version": 2,
  "description": "Winter in the north of Sweden. High mountains, white snow and trees."
}