Examine source code of Spinning rotation. .

{
  "theme": {
    "images": {
      "theme_frame": "0226-gra3-blueviol2-kurukuru-new.jpg"
    },
    "colors": {
      "frame": "#c9e9f7",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Spinning rotation. .",
  "manifest_version": 2,
  "description": "くるくる回転。。\n\n\n\n0226-gra3-blueviol2-kurukuru-new●"
}