Close Extra New Tabs

A Chrome extension to keep only one new open at all times, closing extra ones.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Close Extra New Tabs",
  "version": "3.0",
  "description": "A Chrome extension to keep only one new open at all times, closing extra ones.",
  "manifest_version": 3,
  "permissions": [
    "tabs"
  ],
  "icons": {
    "128": "icon128.png"
  },
  "background": {
    "service_worker": "service_worker.js"
  },
  "incognito": "split"
}