diff --git a/packages/trace-viewer/src/sw/main.ts b/packages/trace-viewer/src/sw/main.ts
index 915dafc7ee..3c49b93487 100644
--- a/packages/trace-viewer/src/sw/main.ts
+++ b/packages/trace-viewer/src/sw/main.ts
@@ -78,8 +78,11 @@ async function doFetch(event: FetchEvent): Promise<Response> {
   if (event.request.url.startsWith('chrome-extension://'))
     return fetch(event.request);
 
-  if (event.request.headers.get('x-pw-serviceworker') === 'forward')
-    return fetch(event.request);
+  if (event.request.headers.get('x-pw-serviceworker') === 'forward') {
+    const request = new Request(event.request);
+    request.headers.delete('x-pw-serviceworker')
+    return fetch(request);
+  }
 
   const request = event.request;
   const client = await self.clients.get(event.clientId);