Examine source code of Mozilla Firefox Theme

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Mozilla Firefox Theme",
  "manifest_version": 2,
  "description": "Matching Wallpaper <a href=\"https://outgoing.prod.mozaws.net/v1/9b567b750f8ebbb2e50bf272dc33f900baa9b78ec9ab29cf9314e9f44c19bcca/http%3A//sinine88.deviantart.com/art/Firefox2-176608252\" rel=\"nofollow\">http://sinine88.deviantart.com/art/Firefox2-176608252</a>"
}