Examine source code of Winters Best Days

{
  "theme": {
    "images": {
      "theme_frame": "WintersBestDaysHCustom.jpg"
    },
    "colors": {
      "frame": "#2865de",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Winters Best Days",
  "manifest_version": 2,
  "description": "birds, Bokeh, Christmas, fence, New Years, sky, snow, snowman, trees, winter \n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/444008fdac24705c80d9ae75206d2ab7a669b1f90cf5e9b69f122e63d830f0ef/http%3A//nature.desktopnexus.com/wallpaper/927494/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/927494/</a>"
}