{
  "prefbar:info": {
    "formatversion": 3
  },
  "prefbar:menu:enabled": {
    "items": [
      "prefbar:button:secure_cookie"
    ]
  },
  "prefbar:button:secure_cookie": {
    "type": "check",
    "label": "Cookie",
    "prefstring": "network.cookie.cookieBehavior",
    "topref": "Number(!value)+1",
    "frompref": "value!=2"
  }
}