--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -1495,16 +1495,24 @@ ContentParent::TransformPreallocatedInto
     mOpener = aOpener;
     mAppManifestURL.Truncate();
     mIsForBrowser = true;
 }
 
 void
 ContentParent::ShutDownProcess(ShutDownMethod aMethod)
 {
+#ifdef MOZ_NUWA_PROCESS
+    if (aMethod == SEND_SHUTDOWN_MESSAGE && IsNuwaProcess()) {
+        // We shouldn't send shutdown messages to frozen Nuwa processes,
+        // so just close the channel.
+        aMethod = CLOSE_CHANNEL;
+    }
+#endif
+
     // Shutting down by sending a shutdown message works differently than the
     // other methods. We first call Shutdown() in the child. After the child is
     // ready, it calls FinishShutdown() on us. Then we close the channel.
     if (aMethod == SEND_SHUTDOWN_MESSAGE) {
         if (mIPCOpen && !mShutdownPending && SendShutdown()) {
             mShutdownPending = true;
             // Start the force-kill timer if we haven't already.
             StartForceKillTimer();