Examine source code of Kettle

{
  "theme": {
    "images": {
      "theme_frame": "personatop.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#111078"
    }
  },
  "version": "2.0",
  "name": "Kettle",
  "manifest_version": 2,
  "description": "Matching wallpaper: <a href=\"https://outgoing.prod.mozaws.net/v1/f5ec004e5ece570636f3ee5337771b915bf4d3d151d2b6f58766e3847b6331d1/http%3A//i43.tinypic.com/35m1tfd.jpg\" rel=\"nofollow\">http://i43.tinypic.com/35m1tfd.jpg</a>"
}