Examine source code of Udemy Price Tracker

{
  "manifest_version": 2,
  "name": "Udemy Price Tracker",
  "version": "1.5",
  "description": "Track Udemy course prices and get notified of discounts",
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "tabs",
    "https://www.udemy.com/*",
    "https://dhwnh.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "udemy-price-tracker@addon",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "utils.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon48.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon48.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.udemy.com/*"
      ],
      "js": [
        "utils.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}