Tally Tab

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "version": "0.3",
  "name": "Tally Tab",
  "description": "Your New Tab Calculator",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "icons": {
    "128": "tally_128.png"
  },
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_icon": "tally_128.png"
  }
}