Countdown To Christmas

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "version": "1.0.2",
  "name": "Countdown To Christmas",
  "description": "Are you waiting for Christmas Day? Do you want to know how many days until Christmas? Try this Countdown to Christmas.",
  "offline_enabled": true,
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "action": {
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "128": "icon/128.png"
    }
  },
  "background": {
    "service_worker": "service-worker.js"
  }
}