diff --git a/mozglue/misc/PreXULSkeletonUI.cpp b/mozglue/misc/PreXULSkeletonUI.cpp
index 447911183e33..e548212712f6 100644
--- a/mozglue/misc/PreXULSkeletonUI.cpp
+++ b/mozglue/misc/PreXULSkeletonUI.cpp
@@ -535,4 +535,11 @@ MFBT_API void SetPreXULSkeletonUIEnabled(bool value) {
   sPreXULSkeletonUIEnabled = true;
 }
 
+MFBT_API void PollPreXULSkeletonUIEvents() {
+  if (sPreXULSkeletonUIEnabled && sPreXULSkeletonUIWindow) {
+    MSG outMsg = {};
+    PeekMessageW(&outMsg, sPreXULSkeletonUIWindow, 0, 0, 0);
+  }
+}
+
 }  // namespace mozilla
diff --git a/mozglue/misc/PreXULSkeletonUI.h b/mozglue/misc/PreXULSkeletonUI.h
index f8083d99acd8..0f6dc59c4fe1 100644
--- a/mozglue/misc/PreXULSkeletonUI.h
+++ b/mozglue/misc/PreXULSkeletonUI.h
@@ -19,6 +19,7 @@ MFBT_API void PersistPreXULSkeletonUIValues(int screenX, int screenY, int width,
                                             double cssToDevPixelScaling);
 MFBT_API bool GetPreXULSkeletonUIEnabled();
 MFBT_API void SetPreXULSkeletonUIEnabled(bool value);
+MFBT_API void PollPreXULSkeletonUIEvents();
 
 }  // namespace mozilla
 
diff --git a/xpcom/glue/standalone/nsXPCOMGlue.cpp b/xpcom/glue/standalone/nsXPCOMGlue.cpp
index cf8e2659215e..6b91507d4ca8 100644
--- a/xpcom/glue/standalone/nsXPCOMGlue.cpp
+++ b/xpcom/glue/standalone/nsXPCOMGlue.cpp
@@ -33,6 +33,7 @@ typedef void (*NSFuncPtr)();
 #  include <windows.h>
 #  include <mbstring.h>
 #  include "mozilla/WindowsVersion.h"
+#  include "mozilla/PreXULSkeletonUI.h"
 
 typedef HINSTANCE LibHandleType;
 
@@ -310,6 +311,18 @@ static nsresult XPCOMGlueLoad(const char* aXPCOMFile,
       XPCOMGlueUnload();
       return NS_ERROR_FAILURE;
     }
+
+#  ifdef XP_WIN
+    // We call PollPreXULSkeletonUIEvents here in order to not get flagged by
+    // Windows as nonresponsive. In order to not be flagged as such, we seem to
+    // simply need to respond to *a* message every few seconds. The halfway
+    // point on slow systems between process start and nsWindow taking over the
+    // skeleton UI window seems to be XUL being loaded. Accordingly, placing
+    // this call here covers the most ground (as we will call this after
+    // prefetching and loading all of the dlls in dependentlibs.list, which
+    // includes xul.dll.)
+    PollPreXULSkeletonUIEvents();
+#  endif
   }
 #endif
   return NS_OK;