Examine source code of DevWatch

{
  "name": "DevWatch",
  "version": "0.0.1",
  "description": "Watches website health in every 10 minutes and notifies",
  "manifest_version": 2,
  "permissions": [
    "alarms",
    "activeTab",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "DevWatch",
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "128": "images/icon-128.png"
    }
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "dev.roshan.c@gmail.com",
      "strict_min_version": "57.0"
    }
  }
}