diff --git a/layout/generic/nsBlockFrame.cpp b/layout/generic/nsBlockFrame.cpp
index b8d79de9be0..3c900f3f445 100644
--- a/layout/generic/nsBlockFrame.cpp
+++ b/layout/generic/nsBlockFrame.cpp
@@ -368,6 +368,19 @@ nsBlockFrame::List(FILE* out, PRInt32 aIndent) const
     fprintf(out, " next-in-flow=%p", static_cast<void*>(GetNextInFlow()));
   }
 
+  void* IBsibling = GetProperty(nsGkAtoms::IBSplitSpecialSibling);
+  if (IBsibling) {
+    fprintf(out, " IBSplitSpecialSibling=%p", IBsibling);
+  }
+  void* IBprevsibling = GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling);
+  if (IBprevsibling) {
+    fprintf(out, " IBSplitSpecialPrevSibling=%p", IBprevsibling);
+  }
+
+  if (nsnull != mContent) {
+    fprintf(out, " [content=%p]", static_cast<void*>(mContent));
+  }
+
   // Output the rect and state
   fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
   if (0 != mState) {
diff --git a/layout/generic/nsContainerFrame.cpp b/layout/generic/nsContainerFrame.cpp
index d34250dc3ef..bccaf48acdb 100644
--- a/layout/generic/nsContainerFrame.cpp
+++ b/layout/generic/nsContainerFrame.cpp
@@ -1585,6 +1585,14 @@ nsContainerFrame::List(FILE* out, PRInt32 aIndent) const
   if (nsnull != GetNextContinuation()) {
     fprintf(out, " next-continuation=%p", static_cast<void*>(GetNextContinuation()));
   }
+  void* IBsibling = GetProperty(nsGkAtoms::IBSplitSpecialSibling);
+  if (IBsibling) {
+    fprintf(out, " IBSplitSpecialSibling=%p", IBsibling);
+  }
+  void* IBprevsibling = GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling);
+  if (IBprevsibling) {
+    fprintf(out, " IBSplitSpecialPrevSibling=%p", IBprevsibling);
+  }
   fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
   if (0 != mState) {
     fprintf(out, " [state=%08x]", mState);
diff --git a/layout/generic/nsHTMLCanvasFrame.cpp b/layout/generic/nsHTMLCanvasFrame.cpp
index 01e83caae8e..60baa62e3dd 100644
--- a/layout/generic/nsHTMLCanvasFrame.cpp
+++ b/layout/generic/nsHTMLCanvasFrame.cpp
@@ -320,14 +320,5 @@ nsHTMLCanvasFrame::GetFrameName(nsAString& aResult) const
 {
   return MakeFrameName(NS_LITERAL_STRING("HTMLCanvas"), aResult);
 }
-
-NS_IMETHODIMP
-nsHTMLCanvasFrame::List(FILE* out, PRInt32 aIndent) const
-{
-  IndentBy(out, aIndent);
-  ListTag(out);
-  fputs("\n", out);
-  return NS_OK;
-}
 #endif
 
diff --git a/layout/generic/nsHTMLCanvasFrame.h b/layout/generic/nsHTMLCanvasFrame.h
index e6cbc1a56dc..8bab11dbf07 100644
--- a/layout/generic/nsHTMLCanvasFrame.h
+++ b/layout/generic/nsHTMLCanvasFrame.h
@@ -94,7 +94,6 @@ public:
 
 #ifdef DEBUG
   NS_IMETHOD GetFrameName(nsAString& aResult) const;
-  NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
 #endif
 
 protected:
diff --git a/layout/generic/nsPlaceholderFrame.cpp b/layout/generic/nsPlaceholderFrame.cpp
index 4ef7238f3c0..302b780367d 100644
--- a/layout/generic/nsPlaceholderFrame.cpp
+++ b/layout/generic/nsPlaceholderFrame.cpp
@@ -241,6 +241,9 @@ nsPlaceholderFrame::List(FILE* out, PRInt32 aIndent) const
   if (nsnull != nextInFlow) {
     fprintf(out, " next-in-flow=%p", static_cast<void*>(nextInFlow));
   }
+  if (nsnull != mContent) {
+    fprintf(out, " [content=%p]", static_cast<void*>(mContent));
+  }
   if (mOutOfFlowFrame) {
     fprintf(out, " outOfFlowFrame=");
     nsFrame::ListTag(out, mOutOfFlowFrame);