diff --git a/dom/bindings/parser/WebIDL.py b/dom/bindings/parser/WebIDL.py
index 6d46a3a9bc83..fd89a7e36f91 100644
--- a/dom/bindings/parser/WebIDL.py
+++ b/dom/bindings/parser/WebIDL.py
@@ -1049,9 +1049,12 @@ class IDLInterface(IDLObjectWithScope):
                                       "an interface with inherited interfaces",
                                       [attr.location, self.location])
             elif identifier == "Global":
-                if not attr.noArguments():
-                    raise WebIDLError("[Global] must take no arguments",
-                                      [attr.location])
+                if attr.hasValue():
+                    self.globalNames = [ attr.value() ]
+                elif attr.hasArgs():
+                    self.globalNames = attr.args()
+                else:
+                    self.globalNames = [ self.identifier.name ]
                 self._isOnGlobalProtoChain = True
             elif (identifier == "NeedNewResolve" or
                   identifier == "OverrideBuiltins" or
diff --git a/dom/webidl/DedicatedWorkerGlobalScope.webidl b/dom/webidl/DedicatedWorkerGlobalScope.webidl
index 83a200f3c903..48f623c2de90 100644
--- a/dom/webidl/DedicatedWorkerGlobalScope.webidl
+++ b/dom/webidl/DedicatedWorkerGlobalScope.webidl
@@ -12,7 +12,8 @@
  * this document.
  */
 
-[Global, Func="mozilla::dom::workers::DedicatedWorkerGlobalScope::Visible"]
+[Global=(Worker,DedicatedWorker),
+ Func="mozilla::dom::workers::DedicatedWorkerGlobalScope::Visible"]
 interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
   [Throws]
   void postMessage(any message, optional sequence<any> transfer);
diff --git a/dom/webidl/ServiceWorkerGlobalScope.webidl b/dom/webidl/ServiceWorkerGlobalScope.webidl
index b9c3911a0d44..9b63d141dc0d 100644
--- a/dom/webidl/ServiceWorkerGlobalScope.webidl
+++ b/dom/webidl/ServiceWorkerGlobalScope.webidl
@@ -12,7 +12,8 @@
 
 // The Pref controls exposure in general, the Func restricts it to inside the
 // ServiceWorkerGlobalScope (itself).
-[Global, Func="mozilla::dom::workers::ServiceWorkerGlobalScope::Visible",
+[Global=(Worker,ServiceWorker),
+ Func="mozilla::dom::workers::ServiceWorkerGlobalScope::Visible",
  Pref="dom.serviceWorkers.enabled"]
 interface ServiceWorkerGlobalScope : WorkerGlobalScope {
   // FIXME(nsm): Bug 982725
diff --git a/dom/webidl/SharedWorkerGlobalScope.webidl b/dom/webidl/SharedWorkerGlobalScope.webidl
index 06dee655f4db..cda2fb5e4a85 100644
--- a/dom/webidl/SharedWorkerGlobalScope.webidl
+++ b/dom/webidl/SharedWorkerGlobalScope.webidl
@@ -12,7 +12,8 @@
  * this document.
  */
 
-[Global, Func="mozilla::dom::workers::SharedWorkerGlobalScope::Visible"]
+[Global=(Worker,SharedWorker),
+ Func="mozilla::dom::workers::SharedWorkerGlobalScope::Visible"]
 interface SharedWorkerGlobalScope : WorkerGlobalScope {
   readonly attribute DOMString name;
   attribute EventHandler onconnect;