fix: extension web workers net request failing (#45710)

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Maddock <[email protected]>

shell/browser/electron_browser_client.cc

@@ -1052,6 +1052,12 @@ void ElectronBrowserClient::
   // reason for it, and we could consider supporting it in future.
   protocol_registry->RegisterURLLoaderFactories(factories,
                                                 false /* allow_file_access */);
+#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
+  factories->emplace(
+      extensions::kExtensionScheme,
+      extensions::CreateExtensionWorkerMainResourceURLLoaderFactory(
+          browser_context));
+#endif
 }
 
 #if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)