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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.0",
  "name": "pen",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "description": "is an instrument that uses ink, color or lead to write on a surface",
  "manifest_version": 3
}