diff --git a/dom/bindings/Bindings.conf b/dom/bindings/Bindings.conf
index 41ede924a884..4724365b366d 100644
--- a/dom/bindings/Bindings.conf
+++ b/dom/bindings/Bindings.conf
@@ -44,22 +44,6 @@
 #                   Always true for worker descriptors for non-callback
 #                   interfaces.  Defaults to true for non-worker non-callback
 #                   descriptors.
-#   * nativeOwnership: Describes how the native object is held. 3 possible
-#                      types: worker object ('worker'), non-refcounted object
-#                      ('owned'), refcounted object ('refcounted').
-#                      Non-refcounted objects need to inherit from
-#                      mozilla::dom::NonRefcountedDOMObject and preferably use
-#                      MOZ_COUNT_CTOR/MOZ_COUNT_DTOR in their
-#                      constructor/destructor so they participate in leak
-#                      logging.
-#                      This mostly determines how the finalizer releases the
-#                      binding's hold on the native object. For a worker object
-#                      it'll call Release, for a non-refcounted object it'll
-#                      call delete through XPConnect's deferred finalization
-#                      mechanism, for a refcounted object it'll call Release
-#                      through XPConnect's deferred finalization mechanism.
-#                      'worker' opts into old style worker models. Defaults to
-#                      'refcounted'.
 #
 #   The following fields are either a string, an array (defaults to an empty
 #   array) or a dictionary with three possible keys (all, getterOnly and
@@ -1227,17 +1211,14 @@ DOMInterfaces = {
 },
 
 'TextDecoder': {
-    'nativeOwnership': 'owned',
     'wrapperCache': False
 },
 
 'TextEncoder': {
-    'nativeOwnership': 'owned',
     'wrapperCache': False
 },
 
 'TextMetrics': {
-    'nativeOwnership': 'owned',
     'wrapperCache': False
 },
 
@@ -1592,7 +1573,6 @@ DOMInterfaces = {
 
 'XPathExpression': {
     'wrapperCache': False,
-    'nativeOwnership': 'owned',
 },
 
 'XSLTProcessor': {
diff --git a/dom/bindings/Configuration.py b/dom/bindings/Configuration.py
index e3a85ff306b7..1930d6e82113 100644
--- a/dom/bindings/Configuration.py
+++ b/dom/bindings/Configuration.py
@@ -456,11 +456,6 @@ class Descriptor(DescriptorProvider):
                     iface.setUserData('hasProxyDescendant', True)
                     iface = iface.parent
 
-        self.nativeOwnership = desc.get('nativeOwnership', 'refcounted')
-        if not self.nativeOwnership in ('owned', 'refcounted'):
-            raise TypeError("Descriptor for %s has unrecognized value (%s) "
-                            "for nativeOwnership" %
-                            (self.interface.identifier.name, self.nativeOwnership))
         if desc.get('wantsQI', None) != None:
             self._wantsQI = desc.get('wantsQI', None)
         self.wrapperCache = (not self.interface.isCallback() and
diff --git a/dom/bindings/NonRefcountedDOMObject.h b/dom/bindings/NonRefcountedDOMObject.h
index fa931bd69756..d27ae13bb31d 100644
--- a/dom/bindings/NonRefcountedDOMObject.h
+++ b/dom/bindings/NonRefcountedDOMObject.h
@@ -12,12 +12,12 @@
 namespace mozilla {
 namespace dom {
 
-// Natives for DOM classes with 'owned' as the value for nativeOwnership in
-// Bindings.conf need to inherit from this class.
+// Natives for DOM classes that aren't refcounted need to inherit from this
+// class.
 // If you're seeing objects of this class leak then natives for one of the DOM
-// classes with 'owned' as the value for nativeOwnership in Bindings.conf is
-// leaking. If the native for that class has MOZ_COUNT_CTOR/DTOR in its
-// constructor/destructor then it should show up in the leak log too.
+// classes inheriting from it is leaking. If the native for that class has
+// MOZ_COUNT_CTOR/DTOR in its constructor/destructor then it should show up in
+// the leak log too.
 class NonRefcountedDOMObject
 {
 protected: