Examine source code of LindenDudes

{
  "theme": {
    "images": {
      "theme_frame": "header_3000x200.jpg"
    },
    "colors": {
      "frame": "#61a9e0",
      "tab_background_text": "#032840"
    }
  },
  "version": "2.0",
  "name": "LindenDudes",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/c1a9a6b8e3fccf40fa086659439226f8d3b8abb8cfb266e66c51a6d06f1ada9b/http%3A//www.lindendudes.de\" rel=\"nofollow\">www.lindendudes.de</a>\n++German Basketball Team++"
}