Examine source code of Temp Bmail — Disposable Email

{
  "manifest_version": 3,
  "name": "Temp Bmail — Disposable Email",
  "short_name": "Temp Bmail",
  "version": "1.0.0",
  "description": "Generate free, disposable email addresses powered by tempbmail.com. No sign-up. No spam. Just a clean inbox when you need it.",
  "author": "Temp Bmail",
  "homepage_url": "https://tempbmail.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "tempbmail-disposable@tempbmail.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personalCommunications",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Temp Bmail — Disposable Email",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background/service-worker.js"
    ],
    "type": "module"
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "alarms",
    "tabs"
  ],
  "host_permissions": [
    "https://tempbmail.com/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; connect-src https://tempbmail.com; frame-ancestors 'none'; base-uri 'none'; form-action 'none'"
  }
}