Examine source code of Waxwing on Limb

{
  "theme": {
    "images": {
      "theme_frame": "WaxwingonlimbH.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Waxwing on Limb",
  "manifest_version": 2,
  "description": "bird, Scotland, Shetland, sky, \n\nThanks to David Gifford for the use of his beautiful photography.\n<a href=\"https://outgoing.prod.mozaws.net/v1/8a602a4866bb9b7dfa76761234e0f410a96c743865bd792d467b9511cdeb2060/http%3A//www.davegifford.co.uk\" rel=\"nofollow\">http://www.davegifford.co.uk</a>"
}