Examine source code of E-POLY

{
  "manifest_version": 2,
  "name": "E-POLY",
  "version": "3.0",
  "description": "E-POLY is a feature-rich Firefox extension that enhances Polytoria with themes, music playlists, custom fonts, video backgrounds, and more!",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_title": "E-POLY",
    "default_popup": "quick-popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.polytoria.com/*"
      ],
      "js": [
        "e-poly.js"
      ],
      "run_at": "document_start"
    }
  ],
  "content_security_policy": "script-src 'self'; style-src 'self' https://fonts.googleapis.com https://kit-pro.fontawesome.com 'unsafe-inline'; font-src 'self' https://fonts.gstatic.com https://kit-pro.fontawesome.com data:;",
  "permissions": [
    "tabs",
    "storage",
    "menus",
    "*://*.polytoria.com/*",
    "*://api.frankfurter.app/*",
    "*://epoly.vercel.app/*",
    "*://api.polytoria.com/*"
  ],
  "web_accessible_resources": [
    "*.css",
    "icons/*.png",
    "guide.html",
    "guide.js",
    "thanks.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "e-poly@firefox",
      "strict_min_version": "115.0"
    }
  }
}