Examine source code of InstagramView

{
  "manifest_version": 2,
  "name": "Instagram-View",
  "version": "1.3",
  "description": "Instagram View.",
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "cordelialoo@yahoo.com"
    }
  }
}