Examine source code of Quote Normalizer

{
  "manifest_version": 3,
  "name": "Quote Normalizer",
  "version": "1.0.2",
  "description": "Normalize curly quotes to straight quotes (or vice versa) when copying text",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "clipboardWrite"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Quote Normalizer Settings",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{23428114-7b67-4a9d-bef0-1929afddef06}"
    }
  }
}