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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Personal Dashboard",
  "version": "1.0.0",
  "description": "Personal Dashboard",
  "action": {
    "default_icon": "icon.png"
  },
  "chrome_url_overrides": {
    "newtab": "1.html"
  }
}