Timer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Timer",
  "description": "This is a simple pomodoro timer.",
  "version": "0.1",
  "browser_action": {
    "default_icon": "pomodoro_x128.png",
    "default_popup": "pomodoro-timer.html"
  },
  "icons": {
    "128": "pomodoro_x128.png"
  },
  "permissions": [
    "background",
    "storage",
    "notifications"
  ],
  "background": {
    "page": "background.html"
  }
}