Examine source code of Local Storage Manager

{
  "manifest_version": 3,
  "name": "Local Storage Manager",
  "version": "1.1",
  "description": "Export and import local storage",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "localStorage-Manager@example.com"
    }
  }
}