Examine source code of It goes off somewhere.

{
  "theme": {
    "images": {
      "theme_frame": "704-sky-kumoukabu--01syguranuri.jpg"
    },
    "colors": {
      "frame": "#e7f0c9",
      "tab_background_text": "#030000"
    }
  },
  "version": "2.0",
  "name": "It goes off somewhere.",
  "manifest_version": 2,
  "description": "●●それはどこかに消えていく●●"
}