Examine source code of Blue Backgrounds

{
  "theme": {
    "images": {
      "theme_frame": "BlueBackgroundHCustom.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue Backgrounds",
  "manifest_version": 2,
  "description": "twisted blue, black, lines, stripes. twist, swish, flash, My desktop wallpaper that matches can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/30794abb16c3c636842bbeb99cf7ecc9f22ca7a556fde783b5839961d38f41b0/http%3A//abstract.desktopnexus.com/wallpaper/620816/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/620816/</a>"
}