Examine source code of LeOn Customizer (PW)

{
  "manifest_version": 3,
  "name": "LeOn Customizer (PW)",
  "version": "1.3",
  "description": "Spersonalizowane obrazy kursów na platformie LeOn (Politechnika Warszawska)",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://leon.pw.edu.pl/my/courses.php"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "LeOn Customizer",
    "default_icon": "logo.svg"
  },
  "icons": {
    "16": "logo.svg",
    "32": "logo.svg",
    "48": "logo.svg",
    "128": "logo.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "https://leon.pw.edu.pl/my/courses.php"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "leon-course-images@gameefan.me",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}