Examine source code of RemindMe

{
  "manifest_version": 2,
  "name": "RemindMe",
  "version": "1.1",
  "description": "Adds a reminder to specific events",
  "icons": {
    "48": "./timetable.png"
  },
  "background": {
    "page": "remind-me.html"
  },
  "browser_action": {
    "default_icon": "./timetable.png",
    "default_title": "RemindMe",
    "default_popup": "remind-me-popup.html"
  },
  "permissions": [
    "alarms",
    "notifications",
    "storage"
  ]
}