diff --git a/dom/bindings/test/TestBindingHeader.h b/dom/bindings/test/TestBindingHeader.h
index b76bc2f5b8d..4f26f0b77ad 100644
--- a/dom/bindings/test/TestBindingHeader.h
+++ b/dom/bindings/test/TestBindingHeader.h
@@ -16,6 +16,8 @@
 #include "../TestCodeGenBinding.h"
 #include "mozilla/dom/UnionTypes.h"
 
+extern bool TestFuncControlledMember(JSContext*, JSObject*);
+
 namespace mozilla {
 namespace dom {
 
@@ -470,6 +472,27 @@ public:
   void PassVariadicThirdArg(const nsAString&, int32_t,
                             const Sequence<OwningNonNull<TestInterface> >&);
 
+  // Conditionally exposed methods/attributes
+  bool Prefable1();
+  bool Prefable2();
+  bool Prefable3();
+  bool Prefable4();
+  bool Prefable5();
+  bool Prefable6();
+  bool Prefable7();
+  bool Prefable8();
+  bool Prefable9();
+  void Prefable10();
+  void Prefable11();
+  bool Prefable12();
+  void Prefable13();
+  bool Prefable14();
+  bool Prefable15();
+  bool Prefable16();
+  void Prefable17();
+  void Prefable18();
+  void Prefable19();
+
   // Miscellania
   int32_t AttrWithLenientThis();
   void SetAttrWithLenientThis(int32_t);
diff --git a/dom/bindings/test/TestCodeGen.webidl b/dom/bindings/test/TestCodeGen.webidl
index 1d990896d71..1cf9a699bf9 100644
--- a/dom/bindings/test/TestCodeGen.webidl
+++ b/dom/bindings/test/TestCodeGen.webidl
@@ -449,6 +449,46 @@ interface TestInterface {
   // Variadic handling
   void passVariadicThirdArg(DOMString arg1, long arg2, TestInterface... arg3);
 
+  // Conditionally exposed methods/attributes
+  [Pref="abc.def"]
+  readonly attribute boolean prefable1;
+  [Pref="abc.def"]
+  readonly attribute boolean prefable2;
+  [Pref="ghi.jkl"]
+  readonly attribute boolean prefable3;
+  [Pref="ghi.jkl"]
+  readonly attribute boolean prefable4;
+  [Pref="abc.def"]
+  readonly attribute boolean prefable5;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable6;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable7;
+  [Pref="ghi.jkl", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable8;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable9;
+  [Pref="abc.def"]
+  void prefable10();
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  void prefable11();
+  [Pref="abc.def", Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable12;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  void prefable13();
+  [Pref="abc.def", Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable14;
+  [Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable15;
+  [Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable16;
+  [Pref="abc.def", Func="TestFuncControlledMember"]
+  void prefable17();
+  [Func="TestFuncControlledMember"]
+  void prefable18();
+  [Func="TestFuncControlledMember"]
+  void prefable19();
+
   // Miscellania
   [LenientThis] attribute long attrWithLenientThis;
   [Unforgeable] readonly attribute long unforgeableAttr;
diff --git a/dom/bindings/test/TestExampleGen.webidl b/dom/bindings/test/TestExampleGen.webidl
index 82ef645f687..9e3a5a2797e 100644
--- a/dom/bindings/test/TestExampleGen.webidl
+++ b/dom/bindings/test/TestExampleGen.webidl
@@ -365,6 +365,46 @@ interface TestExampleInterface {
   // Variadic handling
   void passVariadicThirdArg(DOMString arg1, long arg2, TestInterface... arg3);
 
+  // Conditionally exposed methods/attributes
+  [Pref="abc.def"]
+  readonly attribute boolean prefable1;
+  [Pref="abc.def"]
+  readonly attribute boolean prefable2;
+  [Pref="ghi.jkl"]
+  readonly attribute boolean prefable3;
+  [Pref="ghi.jkl"]
+  readonly attribute boolean prefable4;
+  [Pref="abc.def"]
+  readonly attribute boolean prefable5;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable6;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable7;
+  [Pref="ghi.jkl", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable8;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  readonly attribute boolean prefable9;
+  [Pref="abc.def"]
+  void prefable10();
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  void prefable11();
+  [Pref="abc.def", Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable12;
+  [Pref="abc.def", Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  void prefable13();
+  [Pref="abc.def", Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable14;
+  [Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable15;
+  [Func="TestFuncControlledMember"]
+  readonly attribute boolean prefable16;
+  [Pref="abc.def", Func="TestFuncControlledMember"]
+  void prefable17();
+  [Func="TestFuncControlledMember"]
+  void prefable18();
+  [Func="TestFuncControlledMember"]
+  void prefable19();
+
   // Miscellania
   [LenientThis] attribute long attrWithLenientThis;
   [Unforgeable] readonly attribute long unforgeableAttr;