Examine source code of Cloud disappearing.

{
  "theme": {
    "images": {
      "theme_frame": "1a-----kumo-531--70psyka--02.jpg"
    },
    "colors": {
      "frame": "#f0ceeb",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Cloud disappearing.",
  "manifest_version": 2,
  "description": "。●消えてゆく雲。●"
}