Examine source code of Wild Space

{
  "theme": {
    "images": {
      "theme_frame": "SpaceAdventure.jpg"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "Wild Space",
  "manifest_version": 2,
  "description": "You can also veiw the original artwork here \n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/3021891c75e610955c47a8f5596e7e9e1fa7b516e5413fdbec346bfd2b5303ff/http%3A//fav.me/d2a4q0p\">http://fav.me/d2a4q0p</a>"
}