Examine source code of Sync To IO Drive

{
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "iodrive1@iointegration.com",
      "strict_min_version": "57.0"
    }
  },
  "name": "Sync To IO Drive",
  "browser_action": {},
  "version": "0.19",
  "description": "Chrome extension for IOAPP",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/PORTAL/*",
        "http://*/PORTAL/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "contextMenus",
    "nativeMessaging",
    "notifications",
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "iologo16.png",
    "48": "iologo48.png",
    "128": "iologo128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}