Examine source code of River Valley

{
  "theme": {
    "images": {
      "theme_frame": "hdrivervalley2.jpg"
    },
    "colors": {
      "frame": "#7cb628",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "River Valley",
  "manifest_version": 2,
  "description": "Firefox Persona version of my “River Valley” wallpaper. 3D artwork by Ryan Bliss. Persona Designed by Mark Hamilton for Digital Blasphemy. Wallpaper available at <a href=\"https://outgoing.prod.mozaws.net/v1/536fecbd32fac3ea38e3c7779192b442e41507ae22eda908408cf9aa3efcdd55/http%3A//digitalblasphemy.com/preview.shtml%3Fi=rivervalley2\" rel=\"nofollow\">http://digitalblasphemy.com/preview.shtml?i=rivervalley2</a>"
}