Examine source code of RareForce

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#262626",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "RareForce",
  "manifest_version": 2,
  "description": "This is the official Personas Thema for <a href=\"https://outgoing.prod.mozaws.net/v1/1e775db2f1005b45a6e3f07330411f34a54fe1adc314421446882f5a4c65c858/http%3A//RareForce.FM\" rel=\"nofollow\">RareForce.FM</a> - The Experience of Sound!"
}