Examine source code of Seashells Galore

{
  "theme": {
    "images": {
      "theme_frame": "SeashellsGalore.jpg"
    },
    "colors": {
      "frame": "#12888a",
      "tab_background_text": "#12888a"
    }
  },
  "version": "2.0",
  "name": "Seashells Galore",
  "manifest_version": 2,
  "description": "Seashells, Shells, Nature\n\nImage source: <a href=\"https://outgoing.prod.mozaws.net/v1/f5ce9688147b9a0559b99d4e87bbbb9e31aba3ee831aeaf779bd1dcf42ff4c09/http%3A//www.kadri10.pri.ee/africa/files/seashells.jpg\" rel=\"nofollow\">http://www.kadri10.pri.ee/africa/files/seashells.jpg</a>"
}