Examine source code of MonStars4U Halloween

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#240101",
      "tab_background_text": "#f7e6e6"
    }
  },
  "version": "2.0",
  "name": "MonStars4U Halloween",
  "manifest_version": 2,
  "description": "Spook up your Firefox browser with some Star Bats (dreamt up by MonStars4U!) based on Monster World, created by the MonStar and brought to you by MonStars4U!\n\nMonStars4U\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/b0de289e4aeda4abc25d75b0b822ad37b70d8213c406da59013d27ad1950071d/http%3A//www.facebook.com/MonStars4U\">www.facebook.com/MonStars4U</a>\nGuaranteed All Stars ~ All The Time :)\n☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★"
}