diff --git a/parser/html/nsHtml5StateSnapshot.cpp b/parser/html/nsHtml5StateSnapshot.cpp
index 2ac45a1f08..67f309a3e5 100644
--- a/parser/html/nsHtml5StateSnapshot.cpp
+++ b/parser/html/nsHtml5StateSnapshot.cpp
@@ -163,11 +163,11 @@ nsHtml5StateSnapshot::~nsHtml5StateSnapshot()
 {
   MOZ_COUNT_DTOR(nsHtml5StateSnapshot);
   for (int32_t i = 0; i < stack.length; i++) {
-    stack[i]->release(nullptr);
+    stack[i]->release();
   }
   for (int32_t i = 0; i < listOfActiveFormattingElements.length; i++) {
     if (listOfActiveFormattingElements[i]) {
-      listOfActiveFormattingElements[i]->release(nullptr);
+      listOfActiveFormattingElements[i]->release();
     }
   }
 }
diff --git a/parser/html/nsHtml5TreeBuilder.h b/parser/html/nsHtml5TreeBuilder.h
index 81ffab00d2..4f484a104d 100644
--- a/parser/html/nsHtml5TreeBuilder.h
+++ b/parser/html/nsHtml5TreeBuilder.h
@@ -299,9 +299,6 @@ class nsHtml5TreeBuilder : public nsAHtml5TreeBuilderState
     nsIContentHandle* contextNode;
     autoJArray<int32_t,int32_t> templateModeStack;
     int32_t templateModePtr;
-    autoJArray<nsHtml5StackNode*, int32_t> stackNodes;
-    int32_t stackNodesIdx;
-    int32_t numStackNodes;
     autoJArray<nsHtml5StackNode*,int32_t> stack;
     int32_t currentPtr;
     autoJArray<nsHtml5StackNode*,int32_t> listOfActiveFormattingElements;
@@ -404,33 +401,6 @@ class nsHtml5TreeBuilder : public nsAHtml5TreeBuilderState
     void addAttributesToHtml(nsHtml5HtmlAttributes* attributes);
     void pushHeadPointerOntoStack();
     void reconstructTheActiveFormattingElements();
-
-  public:
-    void notifyUnusedStackNode(int32_t idxInStackNodes);
-
-  private:
-    nsHtml5StackNode* getUnusedStackNode();
-    nsHtml5StackNode* createStackNode(int32_t flags,
-                                      int32_t ns,
-                                      nsIAtom* name,
-                                      nsIContentHandle* node,
-                                      nsIAtom* popName,
-                                      nsHtml5HtmlAttributes* attributes);
-    nsHtml5StackNode* createStackNode(nsHtml5ElementName* elementName,
-                                      nsIContentHandle* node);
-    nsHtml5StackNode* createStackNode(nsHtml5ElementName* elementName,
-                                      nsIContentHandle* node,
-                                      nsHtml5HtmlAttributes* attributes);
-    nsHtml5StackNode* createStackNode(nsHtml5ElementName* elementName,
-                                      nsIContentHandle* node,
-                                      nsIAtom* popName);
-    nsHtml5StackNode* createStackNode(nsHtml5ElementName* elementName,
-                                      nsIAtom* popName,
-                                      nsIContentHandle* node);
-    nsHtml5StackNode* createStackNode(nsHtml5ElementName* elementName,
-                                      nsIContentHandle* node,
-                                      nsIAtom* popName,
-                                      bool markAsIntegrationPoint);
     void insertIntoFosterParent(nsIContentHandle* child);
     nsIContentHandle* createAndInsertFosterParentedElement(int32_t ns, nsIAtom* name, nsHtml5HtmlAttributes* attributes, nsHtml5ContentCreatorFunction creator);
     nsIContentHandle* createAndInsertFosterParentedElement(int32_t ns, nsIAtom* name, nsHtml5HtmlAttributes* attributes, nsIContentHandle* form, nsHtml5ContentCreatorFunction creator);