Examine source code of CryptoTweets

{
  "manifest_version": 2,
  "name": "CryptoTweets",
  "version": "1.1resigned1",
  "description": "Encrypt/Decrypt tweets with your friends and family!",
  "homepage_url": "http://malalisy.com",
  "icons": {
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "tabs",
    "storage",
    "webRequest"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "crypto-tweets.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon-128.png",
    "default_title": "CryptoTweets",
    "default_popup": "popup/popup.html"
  },
  "web_accessible_resources": [],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{01ea03e2-4755-45cb-9128-fb0f51e21a2d}"
    }
  }
}