Examine source code of Riven DB

{
  "theme": {
    "images": {
      "theme_frame": "rivendh3.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Riven DB",
  "manifest_version": 2,
  "description": "Firefox Persona version of my “Riven” wallpaper. 3D artwork by Ryan Bliss. Persona Designed by Mark Hamilton for Digital Blasphemy. Wallpaper available at <a href=\"https://outgoing.prod.mozaws.net/v1/7427106d57ef2393e46610d84da8354cf5d73b1f10596a0ddb19809c3f7b4ce8/http%3A//digitalblasphemy.com/preview.shtml%3Fi=riven\" rel=\"nofollow\">http://digitalblasphemy.com/preview.shtml?i=riven</a>"
}