Examine source code of The Firefox OS v2

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#187adb",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "The Firefox OS v2",
  "manifest_version": 2,
  "description": "The second theme of the Firefox OS mascot by Wolff Olins.\n\nHere's the first one: <a href=\"https://addons.mozilla.org/es/firefox/addon/the-firefox-os/\" rel=\"nofollow\">https://addons.mozilla.org/es/firefox/addon/the-firefox-os/</a>\n\nThanks for your support :)"
}