Examine source code of ZenLite - Facebook Poster

{
  "manifest_version": 2,
  "name": "ZenLite - Facebook Post Scheduler",
  "description": "If you're posting inventory on Facebook Marketplace and want an easier way to manage it from home, try our Zen-LITE extension. Streamline your process with ease right from your laptop or desktop!",
  "version": "0.2.7",
  "author": "Vishy & ZenLite Team",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "zenLiteLogoPlugin.png",
    "default_title": "Schedule Facebook Posts"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/*"
      ],
      "js": [
        "contentscript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "128": "zenLiteLogoPlugin.png"
  },
  "permissions": [
    "scripting",
    "activeTab",
    "storage",
    "alarms",
    "http://*/",
    "https://*/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "zendealeralerts@gmail.com"
    }
  }
}