Examine source code of Corona

{
  "theme": {
    "images": {
      "theme_frame": "hdcorona2.jpg"
    },
    "colors": {
      "frame": "#ffd426",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Corona",
  "manifest_version": 2,
  "description": "Firefox Persona version of my “Corona” wallpaper. \n\n3D artwork by Ryan Bliss. Persona Designed by Mark Hamilton for Digital Blasphemy. \n\nWallpaper available at <a href=\"https://outgoing.prod.mozaws.net/v1/8158ab98118a3139e084eb713560d67efe326db7999c7b4463c5de0c58c8d49e/http%3A//digitalblasphemy.com/preview.shtml%3Fi=corona2\" rel=\"nofollow\">http://digitalblasphemy.com/preview.shtml?i=corona2</a>"
}