Examine source code of Mindful Twitter

{
  "manifest_version": 2,
  "name": "Mindfull Twitter",
  "version": "0.0.1",
  "description": "Can't get off Twitter? This addon will help you reflect on whether you should use Twitter for a few seconds.",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "MindfullTwitter.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "fhhh09@gmail.com"
    }
  },
  "permissions": [
    "storage"
  ]
}