Examine source code of Website Uptime Tracker

{
  "manifest_version": 2,
  "name": "Website Uptime Tracker",
  "version": "1.1",
  "description": "Track the uptime of websites and get alerts when they go down.",
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/logo_64.png"
  },
  "icons": {
    "64": "icons/logo_64.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c460d02a-775d-4eda-91cd-e38a72e6152d}"
    }
  }
}