diff --git a/xpfe/AppCores/src/nsBrowserAppCore.cpp b/xpfe/AppCores/src/nsBrowserAppCore.cpp
index cc191118687d..8e57a641b446 100644
--- a/xpfe/AppCores/src/nsBrowserAppCore.cpp
+++ b/xpfe/AppCores/src/nsBrowserAppCore.cpp
@@ -312,6 +312,21 @@ nsBrowserAppCore::SetDocumentCharset(const nsString& aCharset)
   return NS_OK;
 }
 
+NS_IMETHODIMP    
+nsBrowserAppCore::Back()
+{
+  Back(mContentAreaWebShell);
+	return NS_OK;
+}
+
+NS_IMETHODIMP    
+nsBrowserAppCore::Forward()
+{
+  Forward(mContentAreaWebShell);
+	return NS_OK;
+}
+
+
 
 NS_IMETHODIMP    
 nsBrowserAppCore::Stop()
@@ -1081,7 +1096,7 @@ nsBrowserAppCore::OnEndDocumentLoad(nsIDocumentLoader* aLoader, nsIURL *aUrl, PR
 done:
   // Stop the throbber and set the urlbar string
 	if (aStatus == NS_OK)
-      setAttribute( mWebShell, "urlbar", "value", url);
+      setAttribute( mWebShell, "urlbar", "value", url);  
 
 	    /* To satisfy a request from the QA group */
 	if (aStatus == NS_OK) {
@@ -1186,26 +1201,26 @@ nsBrowserAppCore::OnEndURLLoad(nsIDocumentLoader* loader,
 //             nsISessionHistory methods              //
 ////////////////////////////////////////////////////////
 
+
 NS_IMETHODIMP    
-nsBrowserAppCore::Back()
+nsBrowserAppCore::Back(nsIWebShell * aPrev)
 {
   if (mSHistory) {
-    mSHistory->Back();
+    mSHistory->Back(aPrev);
   }
-  //  mContentAreaWebShell->Back();
 	return NS_OK;
 }
 
 NS_IMETHODIMP    
-nsBrowserAppCore::Forward()
+nsBrowserAppCore::Forward(nsIWebShell * aPrev)
 {
   if (mSHistory) {
-    mSHistory->Forward();
+    mSHistory->Forward(aPrev);
   }
-  //  mContentAreaWebShell->Forward();
 	return NS_OK;
 }
 
+
 NS_IMETHODIMP
 nsBrowserAppCore::add(nsIWebShell * aWebShell)
 {
@@ -1216,11 +1231,11 @@ nsBrowserAppCore::add(nsIWebShell * aWebShell)
 }
 
 NS_IMETHODIMP
-nsBrowserAppCore::Goto(PRInt32 aGotoIndex)
+nsBrowserAppCore::Goto(PRInt32 aGotoIndex, nsIWebShell * aPrev)
 {
    nsresult rv;
       if (mSHistory) 
-   rv = mSHistory->Goto(aGotoIndex);
+   rv = mSHistory->Goto(aGotoIndex, aPrev);
    return rv;
 }
 
@@ -1231,6 +1246,13 @@ nsBrowserAppCore::SetLoadingFlag(PRBool aFlag)
   return NS_OK;
 }
 
+
+NS_IMETHODIMP
+nsBrowserAppCore::GetLoadingFlag(PRBool &aFlag)
+{
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 nsBrowserAppCore::SetLoadingHistoryEntry(nsHistoryEntry *  aHistoryEntry)
 {
diff --git a/xpfe/AppCores/src/nsBrowserAppCore.h b/xpfe/AppCores/src/nsBrowserAppCore.h
index b61d1a8922c6..c0713610ce2a 100644
--- a/xpfe/AppCores/src/nsBrowserAppCore.h
+++ b/xpfe/AppCores/src/nsBrowserAppCore.h
@@ -65,6 +65,8 @@ class nsBrowserAppCore : public nsBaseAppCore,
     NS_IMETHOD    Init(const nsString& aId);
     NS_IMETHOD    GetId(nsString& aId) { return nsBaseAppCore::GetId(aId); } 
 
+    NS_IMETHOD    Back();
+    NS_IMETHOD    Forward();
     NS_IMETHOD    Stop();
 
     NS_IMETHOD    WalletPreview(nsIDOMWindow* aWin, nsIDOMWindow* aForm);
@@ -95,6 +97,7 @@ class nsBrowserAppCore : public nsBaseAppCore,
     NS_IMETHOD OnStartDocumentLoad(nsIDocumentLoader* loader, nsIURL* aURL, const char* aCommand);
     NS_IMETHOD OnEndDocumentLoad(nsIDocumentLoader* loader, nsIURL *aUrl, PRInt32 aStatus,
 								 nsIDocumentLoaderObserver * aObserver);
+
     NS_IMETHOD OnStartURLLoad(nsIDocumentLoader* loader, nsIURL* aURL, const char* aContentType, 
                             nsIContentViewer* aViewer);
     NS_IMETHOD OnProgressURLLoad(nsIDocumentLoader* loader, nsIURL* aURL, PRUint32 aProgress, 
@@ -129,9 +132,9 @@ class nsBrowserAppCore : public nsBaseAppCore,
 
 
 	// nsISessionHistory methods 
-    NS_IMETHOD Forward();
+    NS_IMETHOD Forward(nsIWebShell * prev);
 
-    NS_IMETHOD Back();
+    NS_IMETHOD Back(nsIWebShell * prev);
 
     NS_IMETHOD canForward(PRBool &aResult);
 
@@ -139,7 +142,7 @@ class nsBrowserAppCore : public nsBaseAppCore,
 
     NS_IMETHOD add(nsIWebShell * aWebShell);
 
-    NS_IMETHOD Goto(PRInt32 aHistoryIndex);
+    NS_IMETHOD Goto(PRInt32 aHistoryIndex, nsIWebShell * prev);
 
     NS_IMETHOD getHistoryLength(PRInt32 & aResult);
 
@@ -149,6 +152,8 @@ class nsBrowserAppCore : public nsBaseAppCore,
 
     NS_IMETHOD SetLoadingFlag(PRBool aFlag);
 
+    NS_IMETHOD GetLoadingFlag(PRBool &aFlag);
+
     NS_IMETHOD SetLoadingHistoryEntry(nsHistoryEntry * aHistoryEntry);
 
 
@@ -171,7 +176,7 @@ class nsBrowserAppCore : public nsBaseAppCore,
     nsIWebShell *       mContentAreaWebShell;
 
     nsIGlobalHistory*   mGHistory;
-	nsISessionHistory * mSHistory;
+	  nsISessionHistory * mSHistory;
 
     nsISupports *       mSearchContext;
 };