Examine source code of Lease window. .

{
  "theme": {
    "images": {
      "theme_frame": "1222--l4green2-oomaricolorful.jpg"
    },
    "colors": {
      "frame": "#dedbdb",
      "tab_background_text": "#f5d7d7"
    }
  },
  "version": "2.0",
  "name": "Lease window. .",
  "manifest_version": 2,
  "description": "リースの窓。。\n\n\n\n1222--l4green2-oomaricolorful"
}