Timer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Timer",
  "version": "1.0.0",
  "description": "A chrome extension that allows you to set timer and alert",
  "author": "ThuNguyen",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "index.html",
    "default_title": "Set!"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "notifications"
  ]
}