Examine source code of colorful trees

{
  "theme": {
    "images": {
      "theme_frame": "FRONT76.JPG"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "colorful trees",
  "manifest_version": 2,
  "description": "pattern from <a href=\"https://outgoing.prod.mozaws.net/v1/c1a919779b38cb9a7c86bcdc95a4e9aac7ef174c4fab876aa061e988fa23932d/http%3A//www.notonthehighstreet.com/sukie\" rel=\"nofollow\">http://www.notonthehighstreet.com/sukie</a>"
}