Examine source code of LockMagic Web Apps

{
  "manifest_version": 2,
  "name": "LockMagic Web Apps",
  "short_name": "LockMagic",
  "version": "2.0.10.7resigned1",
  "description": "Lockmagic brings identity-based encryption to Gmail, Outlook, Gdrive, OneDrive and Dropbox. Send encrypted email or Share encrypted files without passwords",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Secure Email & Files.",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "https://www.lockmagic.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{677cfd42-4bab-46b3-90d0-38a3925a2ddd}"
    }
  }
}