Examine source code of Note the chestnut thorn. .

{
  "theme": {
    "images": {
      "theme_frame": "0320-233-grakoi-kuriigawaku-l4.jpg"
    },
    "colors": {
      "frame": "#bfc3cf",
      "tab_background_text": "#7363eb"
    }
  },
  "version": "2.0",
  "name": "Note the chestnut thorn. .",
  "manifest_version": 2,
  "description": "栗のとげに注意してください。。\n\n\n\n0320-233-grakoi-kuriigawaku-l4-●"
}