Examine source code of Email Alias Generator

{
  "manifest_version": 2,
  "name": "Email Alias Generator",
  "version": "1.0",
  "description": "Generate disposable or alias email addresses for sign-ups.",
  "permissions": [
    "clipboardWrite"
  ],
  "browser_action": {
    "default_title": "Generate Alias Email",
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d5bb6860-2b7a-4f4c-b20d-f96c9b5ab782}"
    }
  }
}