Examine source code of Thunderbolt the Fox

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxTheme2.png"
    },
    "colors": {
      "frame": "#4eb6ff",
      "tab_background_text": "#4eb6ff"
    }
  },
  "version": "2.0",
  "name": "Thunderbolt the Fox",
  "manifest_version": 2,
  "description": "Features Thunder's Symbol Mark II\n\n<a href=\"https://outgoing.prod.mozaws.net/v1/87ddab1636efdadc267293f23621ca0f26be83880bd3e5fff50b9b13f4d4b3fe/http%3A//thunderbolt-the-fox.deviantart.com/\" rel=\"nofollow\">http://thunderbolt-the-fox.deviantart.com/</a>"
}