Examine source code of Faceit Viewer on Steam

{
  "manifest_version": 2,
  "name": "Faceit Stats Viewer",
  "version": "1.2.0",
  "description": "Показывает статистику Faceit на профилях Steam.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "https://faceit-proxy-server.vercel.app/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://steamcommunity.com/id/*",
        "*://steamcommunity.com/profiles/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "icons/icon-48.png",
    "icons/levels/*.png"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src 'self' data: https://distribution.faceit-cdn.net https://assets.faceit-cdn.net https://flagcdn.com;",
  "browser_specific_settings": {
    "gecko": {
      "id": "{84cd6ebb-c945-4f39-91ac-e24761e79cb6}"
    }
  }
}