Examine source code of Kitty at Christmas Window

{
  "theme": {
    "images": {
      "theme_frame": "ChristmasWindowHeader.jpg"
    },
    "colors": {
      "frame": "#caedec",
      "tab_background_text": "#050505"
    }
  },
  "version": "2.0",
  "name": "Kitty at Christmas Window",
  "manifest_version": 2,
  "description": "Kitty is sitting at the window and looking forward for Christmas. Snow, Candle, Snowflakes, Candlelight"
}