Examine source code of sky&etc

{
  "theme": {
    "images": {
      "theme_frame": "topsunsky.jpg"
    },
    "colors": {
      "frame": "#857474",
      "tab_background_text": "#eb9090"
    }
  },
  "version": "2.0",
  "name": "sky&etc",
  "manifest_version": 2,
  "description": "背景は日本の珍しい空の自然色。夕焼け。\nその他との合成のみの編集。"
}