Examine source code of This Day In Rock

{
  "theme": {
    "images": {
      "theme_frame": "Thisdayinrock-5.jpg"
    },
    "colors": {
      "frame": "#7d1515",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "This Day In Rock",
  "manifest_version": 2,
  "description": "This is a representation of the kewl rock history site <a href=\"https://outgoing.prod.mozaws.net/v1/2a5c82151a0790bb59b69f71d67ce04e7691f7ab88835db32937ef92fe882409/http%3A//Thisdayinrock.com\" rel=\"nofollow\">Thisdayinrock.com</a>."
}