Examine source code of Auto Tab Refresher (NDC)

{
  "manifest_version": 3,
  "name": "Simple Auto Refresher",
  "version": "1.0.1",
  "description": "Auto refresh the current tab at a custom interval.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icons/auto-refresher-icon-16.png",
    "32": "icons/auto-refresher-icon-32.png",
    "64": "icons/auto-refresher-icon-64.png",
    "96": "icons/auto-refresher-icon-96.png"
  },
  "action": {
    "default_title": "Auto Refresher",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/auto-refresher-icon-16.png",
      "32": "icons/auto-refresher-icon-32.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "autorefresher@letholdus.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}