Examine source code of Winter evening star

{
  "theme": {
    "images": {
      "theme_frame": "theeveningstar.jpg"
    },
    "colors": {
      "frame": "#7988a6",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Winter evening star",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/5d6d2826574a45d8d82e7e3ec8ff949a50608e5a6211a84c9416eb90d2ac5ca8/http%3A//abstract.desktopnexus.com/wallpaper/521913/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/521913/</a>   pine fir forest snow flakes stars evening Christmas balls mountain snow man cheerful December scenery sky twilight magic childhood wood house chalet winter hill cold frozen chill swan black cat birds Real.Twilight"
}