[DevTools] fix: validate url in file fetcher bridging calls (facebook#34498)

hoxyq · web-flow · commit 92d7ad5dd976 · 2025-09-15T18:14:09.000+01:00
This was prone to races and sometimes messed up symbolication when
multiple source maps were fetched simultaneously.
diff --git a/packages/react-devtools-extensions/src/main/fetchFileWithCaching.js b/packages/react-devtools-extensions/src/main/fetchFileWithCaching.js
@@ -82,7 +82,7 @@ const fetchFromPage = async (url, resolve, reject) => {
   debugLog('[main] fetchFromPage()', url);
 
   function onPortMessage({payload, source}) {
-    if (source === 'react-devtools-background') {
+    if (source === 'react-devtools-background' && payload?.url === url) {
       switch (payload?.type) {
         case 'fetch-file-with-cache-complete':
           chrome.runtime.onMessage.removeListener(onPortMessage);
