manifest.json { “name”: “SocketIO Extension”, “version”: “1.0”, “manifest_version”: 3, “background”: { “service_worker”: “background.js”, “type”: “module” }, “permissions”: [“activeTab”] } background.js // import { io } from ‘socket.io-client’; // import { io } from ‘https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.7.5/socket.io.js’ // import { io } from ‘https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.7.5/socket.io.min.js’ // import { io } from ‘./socket.io.esm.min.js’ // import { io } from ‘./socket.io.js’ […]