diff --git a/webshell/tests/viewer/nsBrowserWindow.cpp b/webshell/tests/viewer/nsBrowserWindow.cpp
index a4b72712224c..e4bf61971699 100644
--- a/webshell/tests/viewer/nsBrowserWindow.cpp
+++ b/webshell/tests/viewer/nsBrowserWindow.cpp
@@ -17,6 +17,7 @@
  * Netscape Communications Corporation.  All Rights Reserved.
  */
 #include "nsIPref.h"
+#include "prmem.h"
 
 #ifdef XP_MAC
 #include "nsBrowserWindow.h"
@@ -136,6 +137,7 @@ static NS_DEFINE_IID(kIDialogIID, NS_IDIALOG_IID);
 static NS_DEFINE_IID(kICheckButtonIID, NS_ICHECKBUTTON_IID);
 static NS_DEFINE_IID(kIRadioButtonIID, NS_IRADIOBUTTON_IID);
 static NS_DEFINE_IID(kILabelIID, NS_ILABEL_IID);
+static NS_DEFINE_IID(kINetSupportIID,         NS_INETSUPPORT_IID);
 
 
 static const char* gsAOLFormat = "AOLMAIL";
@@ -1553,15 +1555,25 @@ nsBrowserWindow::OnStopBinding(nsIURL* aURL,
 NS_IMETHODIMP_(void)
 nsBrowserWindow::Alert(const nsString &aText)
 {
-  nsAutoString str(aText);
-  printf("Browser Window Alert: %s\n", str);
+  char* msg = nsnull;
+
+  msg = aText.ToNewCString();
+  if (nsnull != msg) {
+    printf("Browser Window Alert: %s\n", msg);
+    PR_Free(msg);
+  }
 }
 
 NS_IMETHODIMP_(PRBool)
 nsBrowserWindow::Confirm(const nsString &aText)
 {
-  nsAutoString str(aText);
-  printf("Browser Window Confirm: %s (returning false)\n", str);
+  char* msg= nsnull;
+
+  msg = aText.ToNewCString();
+  if (nsnull != msg) {
+    printf("Browser Window Confirm: %s (returning false)\n", msg);
+    PR_Free(msg);
+  }
 
   return PR_FALSE;
 }
@@ -1571,12 +1583,18 @@ nsBrowserWindow::Prompt(const nsString &aText,
 			const nsString &aDefault,
 			nsString &aResult)
 {
-  nsAutoString str(aText);
+  char* msg = nsnull;
   char buf[256];
-  printf("Browser Window: %s\n", str);
-  printf("Prompt: ");
-  scanf("%s", buf);
-  aResult = buf;
+
+  msg = aText.ToNewCString();
+  if (nsnull != msg) {
+    printf("Browser Window: %s\n", msg);
+    PR_Free(msg);
+
+    printf("Prompt: ");
+    scanf("%s", buf);
+    aResult = buf;
+  }
   
   return (aResult.Length() > 0);
 }
@@ -1586,16 +1604,22 @@ nsBrowserWindow::PromptUserAndPassword(const nsString &aText,
 				       nsString &aUser,
 				       nsString &aPassword)
 {
-  nsAutoString str(aText);
+  char* msg = nsnull;
   char buf[256];
-  printf("Browser Window: %s\n", str);
-  printf("User: ");
-  scanf("%s", buf);
-  aUser = buf;
-  printf("Password: ");
-  scanf("%s", buf);
-  aPassword = buf;
-  
+
+  msg = aText.ToNewCString();
+  if (nsnull != msg) {
+    printf("Browser Window: %s\n", msg);
+    PR_Free(msg);
+
+    printf("User: ");
+    scanf("%s", buf);
+    aUser = buf;
+
+    printf("Password: ");
+    scanf("%s", buf);
+    aPassword = buf;
+  }
   return (aUser.Length() > 0);
 }
 
@@ -1603,12 +1627,16 @@ NS_IMETHODIMP_(PRBool)
 nsBrowserWindow::PromptPassword(const nsString &aText,
 				nsString &aPassword)
 {
-  nsAutoString str(aText);
+  char* msg = nsnull;
   char buf[256];
-  printf("Browser Window: %s\n", str);
-  printf("Password: ");
-  scanf("%s", buf);
-  aPassword = buf;
+
+  msg = aText.ToNewCString();
+  if (nsnull != msg) {
+    printf("Browser Window: %s\n", msg);
+    printf("Password: ");
+    scanf("%s", buf);
+    aPassword = buf;
+  }
  
   return PR_TRUE;
 }
diff --git a/xpfe/xpviewer/src/nsBrowserWindow.cpp b/xpfe/xpviewer/src/nsBrowserWindow.cpp
index ac5adbae3113..52ddc7020d60 100644
--- a/xpfe/xpviewer/src/nsBrowserWindow.cpp
+++ b/xpfe/xpviewer/src/nsBrowserWindow.cpp
@@ -23,6 +23,8 @@
 #define NS_IMPL_IDS
 #include "nsBrowserWindow.h"
 #endif
+#include "prmem.h"
+
 #include "nsIStreamListener.h"
 #include "nsIAppShell.h"
 #include "nsIWidget.h"
@@ -172,6 +174,7 @@ static NS_DEFINE_IID(kIToolbarItemIID, NS_ITOOLBARITEM_IID);
 static NS_DEFINE_IID(kIPopUpMenuIID, NS_IPOPUPMENU_IID);
 static NS_DEFINE_IID(kIMenuButtonIID, NS_IMENUBUTTON_IID);
 static NS_DEFINE_IID(kIXPBaseWindowIID, NS_IXPBASE_WINDOW_IID);
+static NS_DEFINE_IID(kINetSupportIID, NS_INETSUPPORT_IID);
 
 static const char* gsAOLFormat = "AOLMAIL";
 static const char* gsHTMLFormat = "text/html";
@@ -2485,16 +2488,22 @@ nsBrowserWindow::OnStopBinding(nsIURL* aURL,
 NS_IMETHODIMP_(void)
 nsBrowserWindow::Alert(const nsString &aText)
 {
-  nsAutoString str(aText);
+  char *str;
+
+  str = aText.ToNewCString();
   printf("Browser Window Alert: %s\n", str);
+  PR_Free(str);
 }
 
 //----------------------------------------
 NS_IMETHODIMP_(PRBool)
 nsBrowserWindow::Confirm(const nsString &aText)
 {
-  nsAutoString str(aText);
+  char *str;
+
+  str = aText.ToNewCString();
   printf("Browser Window Confirm: %s (returning false)\n", str);
+  PR_Free(str);
 
   return PR_FALSE;
 }
@@ -2505,9 +2514,13 @@ nsBrowserWindow::Prompt(const nsString &aText,
             const nsString &aDefault,
             nsString &aResult)
 {
-  nsAutoString str(aText);
+  char *str;
   char buf[256];
+
+  str = aText.ToNewCString();
   printf("Browser Window: %s\n", str);
+  PR_Free(str);
+
   printf("Prompt: ");
   scanf("%s", buf);
   aResult = buf;
@@ -2521,9 +2534,13 @@ nsBrowserWindow::PromptUserAndPassword(const nsString &aText,
                      nsString &aUser,
                      nsString &aPassword)
 {
-  nsAutoString str(aText);
+  char *str;
   char buf[256];
+
+  str = aText.ToNewCString();
   printf("Browser Window: %s\n", str);
+  PR_Free(str);
+
   printf("User: ");
   scanf("%s", buf);
   aUser = buf;
@@ -2539,9 +2556,13 @@ NS_IMETHODIMP_(PRBool)
 nsBrowserWindow::PromptPassword(const nsString &aText,
                 nsString &aPassword)
 {
-  nsAutoString str(aText);
+  char *str;
   char buf[256];
+  
+  str = aText.ToNewCString();
   printf("Browser Window: %s\n", str);
+  PR_Free(str);
+
   printf("Password: ");
   scanf("%s", buf);
   aPassword = buf;
diff --git a/xpfe/xpviewer/src/nsXPBaseWindow.cpp b/xpfe/xpviewer/src/nsXPBaseWindow.cpp
index 20e903487b0f..52a54db7dfc8 100644
--- a/xpfe/xpviewer/src/nsXPBaseWindow.cpp
+++ b/xpfe/xpviewer/src/nsXPBaseWindow.cpp
@@ -17,6 +17,7 @@
  * Netscape Communications Corporation.  All Rights Reserved.
  */
 #include "nsIPref.h"
+#include "prmem.h"
 
 #ifdef XP_MAC
 #include "nsXPBaseWindow.h"
@@ -77,6 +78,8 @@ static NS_DEFINE_IID(kIDOMMouseListenerIID,   NS_IDOMMOUSELISTENER_IID);
 static NS_DEFINE_IID(kIDOMEventReceiverIID,   NS_IDOMEVENTRECEIVER_IID);
 static NS_DEFINE_IID(kIDOMElementIID, NS_IDOMELEMENT_IID);
 
+static NS_DEFINE_IID(kINetSupportIID, NS_INETSUPPORT_IID);
+
 //----------------------------------------------------------------------
 nsXPBaseWindow::nsXPBaseWindow() :
   mContentRoot(nsnull),
@@ -638,15 +641,21 @@ NS_IMETHODIMP nsXPBaseWindow::OnStopBinding(nsIURL* aURL, PRInt32 status, const
 //----------------------------------------
 NS_IMETHODIMP_(void) nsXPBaseWindow::Alert(const nsString &aText)
 {
-  nsAutoString str(aText);
+  char *str;
+
+  str = aText.ToNewCString();
   printf("Browser Window Alert: %s\n", str);
+  PR_Free(str);
 }
 
 //----------------------------------------
 NS_IMETHODIMP_(PRBool) nsXPBaseWindow::Confirm(const nsString &aText)
 {
-  nsAutoString str(aText);
+  char *str;
+
+  str = aText.ToNewCString();
   printf("Browser Window Confirm: %s (returning false)\n", str);
+  PR_Free(str);
 
   return PR_FALSE;
 }
@@ -656,9 +665,13 @@ NS_IMETHODIMP_(PRBool) nsXPBaseWindow::Prompt(const nsString &aText,
                                               const nsString &aDefault,
                                               nsString &aResult)
 {
-  nsAutoString str(aText);
+  char *str;
   char buf[256];
+
+  str = aText.ToNewCString();
   printf("Browser Window: %s\n", str);
+  PR_Free(str);
+
   printf("Prompt: ");
   scanf("%s", buf);
   aResult = buf;
@@ -671,9 +684,13 @@ NS_IMETHODIMP_(PRBool) nsXPBaseWindow::PromptUserAndPassword(const nsString &aTe
                                                              nsString &aUser,
                                                              nsString &aPassword)
 {
-  nsAutoString str(aText);
+  char *str;
   char buf[256];
+
+  str = aText.ToNewCString();
   printf("Browser Window: %s\n", str);
+  PR_Free(str);
+
   printf("User: ");
   scanf("%s", buf);
   aUser = buf;
@@ -688,9 +705,13 @@ NS_IMETHODIMP_(PRBool) nsXPBaseWindow::PromptUserAndPassword(const nsString &aTe
 NS_IMETHODIMP_(PRBool) nsXPBaseWindow::PromptPassword(const nsString &aText,
                                                       nsString &aPassword)
 {
-  nsAutoString str(aText);
+  char *str;
   char buf[256];
+
+  str = aText.ToNewCString();
   printf("Browser Window: %s\n", str);
+  PR_Free(str);
+
   printf("Password: ");
   scanf("%s", buf);
   aPassword = buf;