Examine source code of QuickMails - Temporary Email

{
  "manifest_version": 3,
  "name": "QuickMails — Temporary Email",
  "version": "1.0.0",
  "description": "Generate a disposable email address and read incoming messages right from your browser toolbar.",
  "author": "QuickMails",
  "homepage_url": "https://quickmails.eu",
  "action": {
    "default_popup": "popup.html",
    "default_title": "QuickMails",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_page": "options.html",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://quickmails.eu/*",
    "*://*.quickmails.eu/*"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "quickmails@quickmails.eu",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}