Examine source code of FantaX

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#039600",
      "tab_background_text": "#004501"
    }
  },
  "version": "2.0",
  "name": "FantaX",
  "manifest_version": 2,
  "description": "Ein Design im Stil der FantaX Homepage\n<a href=\"https://outgoing.prod.mozaws.net/v1/0faa33365561f10b14cf3d3833eaa9b23edd02c3d26750054981c43b6f550bfc/http%3A//www.fantax.de\" rel=\"nofollow\">http://www.fantax.de</a>"
}