Examine source code of Brown Butterfly

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#212121",
      "tab_background_text": "#fffafa"
    }
  },
  "version": "2.0",
  "name": "Brown Butterfly",
  "manifest_version": 2,
  "description": "A close up image of a butterfly with white text. One of the many photographs i have taken, full collection at <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/97f257f14c95bb1bf7bee60ed5fc135dd7c8c976caa3d292a9a1815ef33a4268/http%3A//www.eyeem.com/u/knasherdaly\">http://www.eyeem.com/u/knasherdaly</a>"
}