Examine source code of Stormbringer

{
  "theme": {
    "images": {
      "theme_frame": "stormbringer.png"
    },
    "colors": {
      "frame": "#d9d8a1",
      "tab_background_text": "#c1542a"
    }
  },
  "version": "2.0",
  "name": "Stormbringer",
  "manifest_version": 2,
  "description": "Illustration by <a href=\"https://outgoing.prod.mozaws.net/v1/305ff66e30f39d3f6c60fd873150abe7372a8b9b85f2a7fef9090fc063442959/http%3A//krhart.com\" rel=\"nofollow\">krhart.com</a>"
}