Examine source code of Nightly on linux

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#5bf9ff"
    }
  },
  "version": "2.0",
  "name": "Nightly on linux",
  "manifest_version": 2,
  "description": "this is a theam that was designed for firefox nightly so dont worry it will work on regular firefox. (Havent heard of firefox nightly? you should go and check it out! Firefox Nightly: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/e163d63ef2ec442c0984eb07a11a3f6abea3d3f708996f566f6831006842ec17/http%3A//nightly.mozilla.org/\">http://nightly.mozilla.org/</a>\n                                   ***Hope You Enjoy!***"
}