Auto-Close New Tabs

Allow only one new tab page at a time.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Auto-Close New Tabs",
  "version": "0.0.0.2",
  "description": "Allow only one new tab page at a time.",
  "manifest_version": 3,
  "incognito": "not_allowed",
  "background": {
    "service_worker": "background.js"
  },
  "permissions": [
    "tabs"
  ],
  "icons": {
    "128": "icon.png"
  }
}