Examine source code of Firefox fractal

{
  "theme": {
    "images": {
      "theme_frame": "firefox_fractal_by_noize_header.jpg"
    },
    "colors": {
      "frame": "#878787",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Firefox fractal",
  "manifest_version": 2,
  "description": "Firefox with fractal effect. If you wanna see more from my works, please visit this page <a href=\"https://outgoing.prod.mozaws.net/v1/09de3e85e0fb0eea218c41fb7b3e4a6b360f29ece4a1afee7ef00e2d06d64967/http%3A//www.youtube.com/watch%3Fv=ZZK_OjvBWD0\" rel=\"nofollow\">http://www.youtube.com/watch?v=ZZK_OjvBWD0</a> . Thank You :)"
}