Examine source code of Mateofix

{
  "theme": {
    "images": {
      "theme_frame": "haut.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Mateofix",
  "manifest_version": 2,
  "description": "Personas officiel de <a href=\"https://outgoing.prod.mozaws.net/v1/87b624486a8d0d5a0f44f4fbd59425bcf3ae72115fd15d9ca459c234eb02e431/http%3A//Mateofix.net\" rel=\"nofollow\">Mateofix.net</a>"
}