Examine source code of Invincible Performance

{
  "theme": {
    "images": {
      "theme_frame": "firefoxheader.jpg"
    },
    "colors": {
      "frame": "#666666",
      "tab_background_text": "#666666"
    }
  },
  "version": "2.0",
  "name": "Invincible Performance",
  "manifest_version": 2,
  "description": "Invincible Performance is all about cars, racing, and extreme sports. <a href=\"https://outgoing.prod.mozaws.net/v1/e4ae6b97a4254b2f5c602c3ff8099180c82420a2e14829e6f37434af2fcdf55a/http%3A//www.invincible-performance.com\" rel=\"nofollow\">http://www.invincible-performance.com</a>"
}