diff --git a/mozilla/webshell/tests/viewer/nsBrowserWindow.cpp b/mozilla/webshell/tests/viewer/nsBrowserWindow.cpp
index 6a6850b96e3..cb242ea3d63 100644
--- a/mozilla/webshell/tests/viewer/nsBrowserWindow.cpp
+++ b/mozilla/webshell/tests/viewer/nsBrowserWindow.cpp
@@ -580,6 +580,7 @@ nsBrowserWindow::DoFileOpen()
     // Ask the Web widget to load the file URL
     mWebShell->LoadURL(nsString(lpszFileURL));
     delete [] lpszFileURL;
+    Show();
   }
 }