diff --git a/mozilla/docshell/base/nsDocShell.cpp b/mozilla/docshell/base/nsDocShell.cpp
index e27b5c162d7..dac6db5c417 100644
--- a/mozilla/docshell/base/nsDocShell.cpp
+++ b/mozilla/docshell/base/nsDocShell.cpp
@@ -5389,6 +5389,10 @@ nsDocShell::RestoreFromHistory()
         }
     }
 
+    // Now that all of the child docshells have been put into place, we can
+    // restart the timers for the window and all of the child frames.
+    privWin->ResumeTimeouts();
+
     // Restore the refresh URI list.  The refresh timers will be restarted
     // when EndPageLoad() is called.
     mLSHE->GetRefreshURIList(getter_AddRefs(mRefreshURIList));
diff --git a/mozilla/dom/public/base/nsPIDOMWindow.h b/mozilla/dom/public/base/nsPIDOMWindow.h
index f55b2e65c9c..22a45350776 100644
--- a/mozilla/dom/public/base/nsPIDOMWindow.h
+++ b/mozilla/dom/public/base/nsPIDOMWindow.h
@@ -77,8 +77,8 @@ class nsIDocument;
 struct nsTimeout;
 
 #define NS_PIDOMWINDOW_IID \
-{ 0x1f9346e6, 0x3814, 0x4c3b, \
-  { 0x9d, 0x04, 0x0b, 0x93, 0x86, 0x53, 0x2b, 0xbf } }
+{ 0x55f987bc, 0xca30, 0x494c, \
+  { 0xa9, 0x85, 0xf1, 0xf3, 0x4b, 0x9d, 0x47, 0xd8 } }
 
 class nsPIDOMWindow : public nsIDOMWindowInternal
 {
@@ -267,6 +267,9 @@ public:
   // Restore the window state from aState.
   virtual nsresult RestoreWindowState(nsISupports *aState) = 0;
 
+  // Resume suspended timeouts in this window and in child windows.
+  virtual nsresult ResumeTimeouts() = 0;
+
   nsPIDOMWindow *GetOuterWindow()
   {
     return mIsInnerWindow ? mOuterWindow : this;
diff --git a/mozilla/dom/src/base/nsGlobalWindow.cpp b/mozilla/dom/src/base/nsGlobalWindow.cpp
index 18c8539f9fa..499529bc559 100644
--- a/mozilla/dom/src/base/nsGlobalWindow.cpp
+++ b/mozilla/dom/src/base/nsGlobalWindow.cpp
@@ -6741,7 +6741,7 @@ nsGlobalWindow::RestoreWindowState(nsISupports *aState)
 
   holder->DidRestoreWindow();
 
-  return inner->ResumeTimeouts();
+  return NS_OK;
 }
 
 void
diff --git a/mozilla/dom/src/base/nsGlobalWindow.h b/mozilla/dom/src/base/nsGlobalWindow.h
index 14bb99ed74d..52f40270791 100644
--- a/mozilla/dom/src/base/nsGlobalWindow.h
+++ b/mozilla/dom/src/base/nsGlobalWindow.h
@@ -394,7 +394,7 @@ protected:
   already_AddRefed<nsIWidget> GetMainWidget();
 
   void SuspendTimeouts();
-  nsresult ResumeTimeouts();
+  virtual nsresult ResumeTimeouts();
 
   void Freeze()
   {