NPI

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "NPI",
  "description": "naurok.com.ua print page improvement",
  "version": "1.0",
  "manifest_version": 3,
  "content_scripts": [
    {
      "css": [
        "npi.css"
      ],
      "js": [
        "npi.js"
      ],
      "matches": [
        "https://naurok.com.ua/test/*/print"
      ]
    }
  ]
}