diff --git a/dom/base/nsDOMClassInfo.cpp b/dom/base/nsDOMClassInfo.cpp
index f75c849951b..3c3f5667ab2 100644
--- a/dom/base/nsDOMClassInfo.cpp
+++ b/dom/base/nsDOMClassInfo.cpp
@@ -478,15 +478,15 @@ static nsDOMClassInfoData sClassInfoData[] = {
   NS_DEFINE_CLASSINFO_DATA(XULCommandDispatcher, nsDOMGenericSH,
                            DOM_DEFAULT_SCRIPTABLE_FLAGS)
 #endif
-  NS_DEFINE_CLASSINFO_DATA(XULControllers, nsNonDOMObjectSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
-  NS_DEFINE_CLASSINFO_DATA(BoxObject, nsDOMGenericSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(XULControllers, nsNonDOMObjectSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(BoxObject, nsDOMGenericSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
 #ifdef MOZ_XUL
-  NS_DEFINE_CLASSINFO_DATA(TreeSelection, nsDOMGenericSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
-  NS_DEFINE_CLASSINFO_DATA(TreeContentView, nsDOMGenericSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(TreeSelection, nsDOMGenericSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(TreeContentView, nsDOMGenericSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
 #endif
 
   // Crypto classes
@@ -503,19 +503,19 @@ static nsDOMClassInfoData sClassInfoData[] = {
                            WINDOW_SCRIPTABLE_FLAGS)
 
 #ifdef MOZ_XUL
-  NS_DEFINE_CLASSINFO_DATA(XULTemplateBuilder, nsDOMGenericSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(XULTemplateBuilder, nsDOMGenericSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
 
-  NS_DEFINE_CLASSINFO_DATA(XULTreeBuilder, nsDOMGenericSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(XULTreeBuilder, nsDOMGenericSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
 #endif
 
   NS_DEFINE_CLASSINFO_DATA(DOMStringList, nsStringListSH,
                            ARRAY_SCRIPTABLE_FLAGS)
 
 #ifdef MOZ_XUL
-  NS_DEFINE_CLASSINFO_DATA(TreeColumn, nsDOMGenericSH,
-                           DEFAULT_SCRIPTABLE_FLAGS)
+  NS_DEFINE_CHROME_ONLY_CLASSINFO_DATA(TreeColumn, nsDOMGenericSH,
+                                       DEFAULT_SCRIPTABLE_FLAGS)
 #endif
 
   NS_DEFINE_CLASSINFO_DATA(CSSMozDocumentRule, nsDOMGenericSH,
diff --git a/dom/webidl/TreeColumns.webidl b/dom/webidl/TreeColumns.webidl
index 6c5497c15b6..be3364b8497 100644
--- a/dom/webidl/TreeColumns.webidl
+++ b/dom/webidl/TreeColumns.webidl
@@ -5,6 +5,7 @@
 interface MozTreeBoxObject;
 interface MozTreeColumn;
 
+[ChromeOnly]
 interface TreeColumns {
   /**
    * The tree widget for these columns.