Examine source code of Uncheck All Inputs

{
  "name": "Uncheck All Inputs",
  "description": "Uncheck all inputs on the page.",
  "version": "0.1",
  "manifest_version": 3,
  "icons": {
    "36": "checkbox_36.png"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "uncheck-all-inputs@basickarl.io"
    }
  },
  "action": {
    "default_title": "Uncheck All Inputs",
    "default_popup": "index.html"
  }
}