Examine source code of Nothing Allowed

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxPersona-BLZ-Signs-NotAllowed-header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#b6ff9f"
    }
  },
  "version": "2.0",
  "name": "Nothing Allowed",
  "manifest_version": 2,
  "description": "not allowed, signs, stop, no eating, no drinking, no smoking, no cameras, no cell phones, no people, no entry, no anything, nothing allowed, roadsigns, highway signs\nTo rate this or leave a comment, login at AMO &amp; scroll down on this page:\n<a href=\"https://addons.mozilla.org/en-US/firefox/addon/nothing-allowed/#id=294478\" rel=\"nofollow\">https://addons.mozilla.org/en-US/firefox/addon/nothing-allowed/#id=294478</a> \nSee all my personas here:\n<a href=\"https://addons.mozilla.org/en-US/firefox/collections/BrianZ/personas/\" rel=\"nofollow\">https://addons.mozilla.org/en-US/firefox/collections/BrianZ/personas/</a> by BrianZ"
}