Examine source code of Winderemere

{
  "theme": {
    "images": {
      "theme_frame": "Lakes87--092.jpg"
    },
    "colors": {
      "frame": "#4a4949",
      "tab_background_text": "#0e758c"
    }
  },
  "version": "2.0",
  "name": "Winderemere",
  "manifest_version": 2,
  "description": "Windermere from Wansfell"
}