Examine source code of Polikek

{
  "manifest_version": 2,
  "name": "Polikek",
  "version": "1.3.0",
  "description": "Скрывает определенные курсы на сайте.",
  "permissions": [
    "storage",
    "https://online.mospolytech.ru/*",
    "https://lms.mospolytech.ru/*",
    "https://redko.us/*"
  ],
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://online.mospolytech.ru/*",
        "https://lms.mospolytech.ru/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "index.html",
    "popup.js",
    "changelog.md"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "polikek@redko.us",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}