Simple Stopwatch

manifest.json

{
  "manifest_version": 3,
  "name": "Simple Stopwatch",
  "version": "1.0",
  "description": "A simple stopwatch Chrome extension",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "logo.png"
  },
  "icons": {
    "128": "logo.png"
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}