Revert "fix(browser): handle EADDRINUSE with automatic port fallback"

This reverts commit 0e6daa2e6e.

src/browser/extension-relay.ts

@@ -6,9 +6,6 @@ import type { Duplex } from "node:stream";
 import WebSocket, { WebSocketServer } from "ws";
 import { isLoopbackAddress, isLoopbackHost } from "../gateway/net.js";
 import { rawDataToString } from "../infra/ws.js";
-import { createSubsystemLogger } from "../logging/subsystem.js";
-
-const logService = createSubsystemLogger("browser").child("relay");
 
 type CdpCommand = {
   id: number;
@@ -706,37 +703,10 @@ export async function ensureChromeExtensionRelayServer(opts: {
     });
   });
 
-  // Try to bind to the requested port, with automatic fallback on EADDRINUSE.
-  let boundPort = info.port;
-  const maxRetries = 10;
-  for (let attempt = 0; attempt < maxRetries; attempt++) {
-    try {
-      await new Promise<void>((resolve, reject) => {
-        const onError = (err: Error) => {
-          server.removeListener("listening", resolve);
-          reject(err);
-        };
-        const onListening = () => {
-          server.removeListener("error", onError);
-          resolve();
-        };
-        server.once("error", onError);
-        server.once("listening", onListening);
-        server.listen(boundPort, info.host);
-      });
-      // Successfully bound
-      break;
-    } catch (err) {
-      const isAddrInUse = (err as { code?: string }).code === "EADDRINUSE";
-      if (isAddrInUse && attempt < maxRetries - 1) {
-        // Try a random port in the dynamic range (49152-65535)
-        boundPort = Math.floor(Math.random() * (65535 - 49152 + 1)) + 49152;
-        logService.warn(`Port ${info.port} is in use, trying alternative port ${boundPort}...`);
-      } else {
-        throw err;
-      }
-    }
-  }
+  await new Promise<void>((resolve, reject) => {
+    server.listen(info.port, info.host, () => resolve());
+    server.once("error", reject);
+  });
 
   const addr = server.address() as AddressInfo | null;
   const port = addr?.port ?? info.port;