Examine source code of Planetside

{
  "theme": {
    "images": {
      "theme_frame": "SolarSystemFirefoxPersonaHeader.jpg"
    },
    "colors": {
      "frame": "#990000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Planetside",
  "manifest_version": 2,
  "description": "Render of a frame from a solar system animation I made before, with some minor edits.\n\nMade in blender.\n\nOriginal Render:\n<a href=\"https://outgoing.prod.mozaws.net/v1/a7017fd57968c88b29bb32a2ae263e88eff625e54c803f4681207ba181786e33/http%3A//fav.me/d2ogd2o\" rel=\"nofollow\">http://fav.me/d2ogd2o</a>"
}