Examine source code of fgreinus.de

{
  "theme": {
    "images": {
      "theme_frame": "ff_head.jpg"
    },
    "colors": {
      "frame": "#f4f4f4",
      "tab_background_text": "#c2dc15"
    }
  },
  "version": "2.0",
  "name": "fgreinus.de",
  "manifest_version": 2,
  "description": "The official theme of <a href=\"https://outgoing.prod.mozaws.net/v1/e63dc30c6fd8429f19fc7fd0fef54c49e49a0f1d9c0be32c46abeed85e68d945/http%3A//fgreinus.de\" rel=\"nofollow\">fgreinus.de</a>"
}