Examine source code of cedrin.net

{
  "theme": {
    "images": {
      "theme_frame": "personacedrinhaut.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#f0e7e7"
    }
  },
  "version": "2.0",
  "name": "cedrin.net",
  "manifest_version": 2,
  "description": "Perso du site <a href=\"https://outgoing.prod.mozaws.net/v1/dabbea9a6ca0599cb5cb4b561c84388f54a7a84b9d2aae0b81d604104174c258/http%3A//CEDRIN.NET\" rel=\"nofollow\">CEDRIN.NET</a>"
}