Examine source code of colorful dot

{
  "theme": {
    "images": {
      "theme_frame": "header_b.jpg"
    },
    "colors": {
      "frame": "#ff95e0",
      "tab_background_text": "#f73e8e"
    }
  },
  "version": "2.0",
  "name": "colorful dot",
  "manifest_version": 2,
  "description": "あなたが少しでも楽しい気分でいられますように。"
}