Examine source code of SummerPeanuts

{
  "theme": {
    "images": {
      "theme_frame": "SummerPeanuts_1.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "SummerPeanuts",
  "manifest_version": 2,
  "description": "Peanuts from <a href=\"https://outgoing.prod.mozaws.net/v1/c25f58e83ac62524737a63a493f558ab72df059a063f4bed7f11225aa589812a/http%3A//Peanuts.com\" rel=\"nofollow\">Peanuts.com</a>\nGreat Comic Strip by Charles M. Schulz."
}