diff --git a/content/base/src/nsCommentNode.cpp b/content/base/src/nsCommentNode.cpp
index 31a911f6adb3..3501f57ba0f1 100644
--- a/content/base/src/nsCommentNode.cpp
+++ b/content/base/src/nsCommentNode.cpp
@@ -311,7 +311,7 @@ nsCommentNode::List(FILE* out, PRInt32 aIndent) const
   PRInt32 indx;
   for (indx = aIndent; --indx >= 0; ) fputs("  ", out);
 
-  fprintf(out, "Comment refcount=%d<!--", mRefCnt);
+  fprintf(out, "Comment@%p refcount=%d<!--", this, mRefCnt);
 
   nsAutoString tmp;
   mInner.ToCString(tmp, 0, mInner.mText.GetLength());
diff --git a/content/base/src/nsGenericElement.cpp b/content/base/src/nsGenericElement.cpp
index cd27a3c01b2b..a5a87438ab73 100644
--- a/content/base/src/nsGenericElement.cpp
+++ b/content/base/src/nsGenericElement.cpp
@@ -2016,6 +2016,7 @@ nsGenericContainerElement::List(FILE* out, PRInt32 aIndent) const
     fputs(buf, out);
     NS_RELEASE(tag);
   }
+  fprintf(out, "@%p", mContent);
 
   ListAttributes(out);
 
diff --git a/content/base/src/nsTextNode.cpp b/content/base/src/nsTextNode.cpp
index 38707d1a4c21..0ad1a173abd5 100644
--- a/content/base/src/nsTextNode.cpp
+++ b/content/base/src/nsTextNode.cpp
@@ -182,7 +182,7 @@ nsTextNode::List(FILE* out, PRInt32 aIndent) const
   PRInt32 index;
   for (index = aIndent; --index >= 0; ) fputs("  ", out);
 
-  fprintf(out, "Text refcount=%d<", mRefCnt);
+  fprintf(out, "Text@%p refcount=%d<", this, mRefCnt);
 
   nsAutoString tmp;
   mInner.ToCString(tmp, 0, mInner.mText.GetLength());
diff --git a/layout/base/src/nsCommentNode.cpp b/layout/base/src/nsCommentNode.cpp
index 31a911f6adb3..3501f57ba0f1 100644
--- a/layout/base/src/nsCommentNode.cpp
+++ b/layout/base/src/nsCommentNode.cpp
@@ -311,7 +311,7 @@ nsCommentNode::List(FILE* out, PRInt32 aIndent) const
   PRInt32 indx;
   for (indx = aIndent; --indx >= 0; ) fputs("  ", out);
 
-  fprintf(out, "Comment refcount=%d<!--", mRefCnt);
+  fprintf(out, "Comment@%p refcount=%d<!--", this, mRefCnt);
 
   nsAutoString tmp;
   mInner.ToCString(tmp, 0, mInner.mText.GetLength());
diff --git a/layout/base/src/nsGenericElement.cpp b/layout/base/src/nsGenericElement.cpp
index cd27a3c01b2b..a5a87438ab73 100644
--- a/layout/base/src/nsGenericElement.cpp
+++ b/layout/base/src/nsGenericElement.cpp
@@ -2016,6 +2016,7 @@ nsGenericContainerElement::List(FILE* out, PRInt32 aIndent) const
     fputs(buf, out);
     NS_RELEASE(tag);
   }
+  fprintf(out, "@%p", mContent);
 
   ListAttributes(out);
 
diff --git a/layout/base/src/nsTextNode.cpp b/layout/base/src/nsTextNode.cpp
index 38707d1a4c21..0ad1a173abd5 100644
--- a/layout/base/src/nsTextNode.cpp
+++ b/layout/base/src/nsTextNode.cpp
@@ -182,7 +182,7 @@ nsTextNode::List(FILE* out, PRInt32 aIndent) const
   PRInt32 index;
   for (index = aIndent; --index >= 0; ) fputs("  ", out);
 
-  fprintf(out, "Text refcount=%d<", mRefCnt);
+  fprintf(out, "Text@%p refcount=%d<", this, mRefCnt);
 
   nsAutoString tmp;
   mInner.ToCString(tmp, 0, mInner.mText.GetLength());