Examine source code of Halochallenges

{
  "theme": {
    "images": {
      "theme_frame": "HChTop.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Halochallenges",
  "manifest_version": 2,
  "description": "A theme for <a href=\"https://outgoing.prod.mozaws.net/v1/74c42214ca0797520100c2bde818ef8c0f400149dde6b729fd2bf27a81d47c74/http%3A//halochallenges.com\" rel=\"nofollow\">halochallenges.com</a>!"
}