Examine source code of FakeCityLights

{
  "theme": {
    "images": {
      "theme_frame": "fclpersona.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "FakeCityLights",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/3b66841b894287ec3d426096aec88bdff4bdd2b8820bf8ede98c53df2e400c8a/http%3A//www.fakecitylights.com\" rel=\"nofollow\">www.fakecitylights.com</a>"
}