Examine source code of There is wallpaper width.

{
  "theme": {
    "images": {
      "theme_frame": "0610-odorinagara-sy-awaiwak-ooo.jpg"
    },
    "colors": {
      "frame": "#f2e4e4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "There is wallpaper width.",
  "manifest_version": 2,
  "description": ".壁紙の幅があります。 。\n\n\n\n0610-odorinagara-sy-awaiwak-ooo"
}