Examine source code of Plagafolium

{
  "theme": {
    "images": {
      "theme_frame": "Persona.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Plagafolium",
  "manifest_version": 2,
  "description": "A Persona according to the website <a href=\"https://outgoing.prod.mozaws.net/v1/c8dc90afa5657d8121790d339b4a5a950e36fa2215d4af529b233cfcd828501c/http%3A//www.plagafolium.de/\" rel=\"nofollow\">http://www.plagafolium.de/</a>"
}