Examine source code of Ready for holidays

{
  "theme": {
    "images": {
      "theme_frame": "6mic.jpg"
    },
    "colors": {
      "frame": "#412d66",
      "tab_background_text": "#ffe600"
    }
  },
  "version": "2.0",
  "name": "Ready for holidays",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/b32d2aeccbbc330f087fd0bd7f6dc8ebbd0ab7bd56129d680477734a0035e375/http%3A//nature.desktopnexus.com/wallpaper/1237177/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1237177/</a>  \n\nCabin, chalet, cottage, house, country, winter, holiday, snowing, snow flakes, light, cozy, snowman, yard, fir, pine tree, bridge, forest, bright, December, winter, season, Christmas, magic, twilight, evening, village, Real.Twilight."
}