Examine source code of Fern Flower

{
  "theme": {
    "images": {
      "theme_frame": "fernh.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#543967"
    }
  },
  "version": "2.0",
  "name": "Fern Flower",
  "manifest_version": 2,
  "description": "colour lovers pattern: <a href=\"https://outgoing.prod.mozaws.net/v1/155f6576a3fe04f8ee7c79bfbf92291969232a9e84e15bf8429ea7d10e89f98b/http%3A//www.colourlovers.com/pattern/497126/fern_flower\" rel=\"nofollow\">http://www.colourlovers.com/pattern/497126/fern_flower</a>"
}