Examine source code of RetroGamerz

{
  "theme": {
    "images": {
      "theme_frame": "retrogamerz.png"
    },
    "colors": {
      "frame": "#030303",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "RetroGamerz",
  "manifest_version": 2,
  "description": "For members/players of our community at <a href=\"https://outgoing.prod.mozaws.net/v1/9d8eea02403b991d484ab6ce3dad747330ef2738c0afd23db5edd15419d6dc27/http%3A//retrogamerz.net\" rel=\"nofollow\">retrogamerz.net</a>"
}