Examine source code of Refresh

{
  "theme": {
    "images": {
      "theme_frame": "Wave2.jpg"
    },
    "colors": {
      "frame": "#599c99",
      "tab_background_text": "#b9ecfa"
    }
  },
  "version": "2.0",
  "name": "Refresh",
  "manifest_version": 2,
  "description": "MATCHING DESKTOP:  <a href=\"https://outgoing.prod.mozaws.net/v1/59f0b08d69bb9bae66a5edaa6aca6fbadf3023614350954d267c424247110a60/http%3A//nature.desktopnexus.com/wallpaper/2712/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/2712/</a>    by Davidmatus  ( ocean sea clear water blue light fresh cool liquid beach crystal sparkling foam white aqua turquoise lake underwater summer tropical relaxing revitalizing pretty hot beautiful coast surf )"
}