Examine source code of Gamers.fr

{
  "theme": {
    "images": {
      "theme_frame": "GamersPersonas.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Gamers.fr",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/47a436e9fcafec93752d6a657b62d53ff2f33356379dbc689cd9e081bc22e22a/http%3A//Gamers.fr\" rel=\"nofollow\">Gamers.fr</a> Persona"
}