Examine source code of Wonderful Spring Day

{
  "theme": {
    "images": {
      "theme_frame": "WonderfulSpringDayH.jpg"
    },
    "colors": {
      "frame": "#f2bcfe",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Wonderful Spring Day",
  "manifest_version": 2,
  "description": "apple blossoms, bird, cherry blossoms, flowers, fresh, leaves, pussy willows, ribbon, Sakura, spring, summer \n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/5509328e11707e925d962271646a2046b9669addfb2d2cdf4ad6fa986b1c1b2d/http%3A//nature.desktopnexus.com/wallpaper/1046233/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1046233/</a>"
}