Examine source code of Persona skyline

{
  "theme": {
    "images": {
      "theme_frame": "blank1.png"
    },
    "colors": {
      "frame": "#3c2580",
      "tab_background_text": "#ebebeb"
    }
  },
  "version": "2.0",
  "name": "Persona skyline",
  "manifest_version": 2,
  "description": "Magnus Blank iPhone art. Visit <a href=\"https://outgoing.prod.mozaws.net/v1/f802a254cee34a0e5f15bff3c963b0653eb1c2141d71afea114b9814378d86c4/http%3A//magnusblank.com\" rel=\"nofollow\">magnusblank.com</a>"
}