Examine source code of Toy land

{
  "theme": {
    "images": {
      "theme_frame": "a-2w-10102he--00-01-02-03-04-05-omochaland.jpg"
    },
    "colors": {
      "frame": "#eddfdf",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Toy land",
  "manifest_version": 2,
  "description": "おもちゃのようなかたち。。"
}