stretch reminder

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "1.1.0",
  "name": "stretch reminder",
  "manifest_version": 2,
  "description": "Stretch Reminder",
  "browser_action": {
    "default_title": "Stretch Reminder",
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "img/stretching.png"
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "content_security_policy": "default-src 'self'; script-src 'self'; style-src * 'unsafe-inline'; img-src 'self' data:;"
}