Examine source code of DSMworld.net

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_TEMPLATE.jpg"
    },
    "colors": {
      "frame": "#bb0201",
      "tab_background_text": "#f0f0f0"
    }
  },
  "version": "2.0",
  "name": "DSMworld.net",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/aab420af1bd3dbbf999cf103213d6e45ebcf69b585fbfad56c96f6d22bf567a5/http%3A//DSMworld.net\" rel=\"nofollow\">DSMworld.net</a> is the german community of performance enthusiasts, who share their love for DSM cars. This persona brings the black red theme of the <a href=\"https://outgoing.prod.mozaws.net/v1/aab420af1bd3dbbf999cf103213d6e45ebcf69b585fbfad56c96f6d22bf567a5/http%3A//DSMworld.net\" rel=\"nofollow\">DSMworld.net</a> website to your Firefox browser."
}