diff --git a/components/script/dom/dedicatedworkerglobalscope.rs b/components/script/dom/dedicatedworkerglobalscope.rs
index 9cae8b597dc..bc4a34eeb1b 100644
--- a/components/script/dom/dedicatedworkerglobalscope.rs
+++ b/components/script/dom/dedicatedworkerglobalscope.rs
@@ -283,7 +283,7 @@ impl DedicatedWorkerGlobalScope {
                                                  scope.reflector().get_jsobject().get());
                 rooted!(in(scope.get_cx()) let mut message = UndefinedValue());
                 data.read(scope.upcast(), message.handle_mut());
-                MessageEvent::dispatch_jsval(target, GlobalRef::Worker(scope), message.handle());
+                MessageEvent::dispatch_jsval(target, scope.upcast(), message.handle());
             },
             WorkerScriptMsg::Common(CommonScriptMsg::RunnableMsg(_, runnable)) => {
                 runnable.handler()
diff --git a/components/script/dom/extendablemessageevent.rs b/components/script/dom/extendablemessageevent.rs
index a0d8b3cf76b..8acddbaf7fa 100644
--- a/components/script/dom/extendablemessageevent.rs
+++ b/components/script/dom/extendablemessageevent.rs
@@ -65,10 +65,10 @@ impl ExtendableMessageEvent {
 
 impl ExtendableMessageEvent {
     pub fn dispatch_jsval(target: &EventTarget,
-                          scope: GlobalRef,
+                          scope: &GlobalScope,
                           message: HandleValue) {
         let Extendablemessageevent = ExtendableMessageEvent::new(
-            scope.as_global_scope(), atom!("message"), false, false, message,
+            scope, atom!("message"), false, false, message,
             DOMString::new(), DOMString::new());
         Extendablemessageevent.upcast::<Event>().fire(target);
     }
diff --git a/components/script/dom/messageevent.rs b/components/script/dom/messageevent.rs
index 62c8c4c5ed4..8192c8301cf 100644
--- a/components/script/dom/messageevent.rs
+++ b/components/script/dom/messageevent.rs
@@ -81,10 +81,10 @@ impl MessageEvent {
 
 impl MessageEvent {
     pub fn dispatch_jsval(target: &EventTarget,
-                          scope: GlobalRef,
+                          scope: &GlobalScope,
                           message: HandleValue) {
         let messageevent = MessageEvent::new(
-            scope.as_global_scope(),
+            scope,
             atom!("message"),
             false,
             false,
diff --git a/components/script/dom/serviceworkerglobalscope.rs b/components/script/dom/serviceworkerglobalscope.rs
index 98380eaa193..52cfbff5bff 100644
--- a/components/script/dom/serviceworkerglobalscope.rs
+++ b/components/script/dom/serviceworkerglobalscope.rs
@@ -239,7 +239,7 @@ impl ServiceWorkerGlobalScope {
                 let _ac = JSAutoCompartment::new(scope.get_cx(), scope.reflector().get_jsobject().get());
                 rooted!(in(scope.get_cx()) let mut message = UndefinedValue());
                 data.read(scope.upcast(), message.handle_mut());
-                ExtendableMessageEvent::dispatch_jsval(target, GlobalRef::Worker(scope), message.handle());
+                ExtendableMessageEvent::dispatch_jsval(target, scope.upcast(), message.handle());
             },
             CommonWorker(WorkerScriptMsg::Common(CommonScriptMsg::RunnableMsg(_, runnable))) => {
                 runnable.handler()
diff --git a/components/script/dom/websocket.rs b/components/script/dom/websocket.rs
index a7bf55b6757..bbdc6a1c9b5 100644
--- a/components/script/dom/websocket.rs
+++ b/components/script/dom/websocket.rs
@@ -587,10 +587,10 @@ impl Runnable for MessageReceivedTask {
         }
 
         // Step 2-5.
-        let global = ws.r().global();
+        let global = ws.global_scope();
         // global.get_cx() returns a valid `JSContext` pointer, so this is safe.
         unsafe {
-            let cx = global.r().get_cx();
+            let cx = global.get_cx();
             let _ac = JSAutoCompartment::new(cx, ws.reflector().get_jsobject().get());
             rooted!(in(cx) let mut message = UndefinedValue());
             match self.message {
@@ -598,10 +598,7 @@ impl Runnable for MessageReceivedTask {
                 MessageData::Binary(data) => {
                     match ws.binary_type.get() {
                         BinaryType::Blob => {
-                            let blob = Blob::new(
-                                global.r().as_global_scope(),
-                                BlobImpl::new_from_bytes(data),
-                                "".to_owned());
+                            let blob = Blob::new(&global, BlobImpl::new_from_bytes(data), "".to_owned());
                             blob.to_jsval(cx, message.handle_mut());
                         }
                         BinaryType::Arraybuffer => {
@@ -617,7 +614,7 @@ impl Runnable for MessageReceivedTask {
                     }
                 },
             }
-            MessageEvent::dispatch_jsval(ws.upcast(), global.r(), message.handle());
+            MessageEvent::dispatch_jsval(ws.upcast(), &global, message.handle());
         }
     }
 }
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 137a46275b1..f5b021feea6 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -1776,7 +1776,7 @@ impl Runnable for PostMessageHandler {
         // Step 11-12.
         // TODO(#12719): set the other attributes.
         MessageEvent::dispatch_jsval(window.upcast(),
-                                     GlobalRef::Window(&*window),
+                                     window.upcast(),
                                      message.handle());
     }
 }
diff --git a/components/script/dom/worker.rs b/components/script/dom/worker.rs
index b959be94354..9b8f3200878 100644
--- a/components/script/dom/worker.rs
+++ b/components/script/dom/worker.rs
@@ -130,12 +130,12 @@ impl Worker {
             return;
         }
 
-        let global = worker.r().global();
+        let global = worker.global_scope();
         let target = worker.upcast();
-        let _ac = JSAutoCompartment::new(global.r().get_cx(), target.reflector().get_jsobject().get());
-        rooted!(in(global.r().get_cx()) let mut message = UndefinedValue());
-        data.read(global.r().as_global_scope(), message.handle_mut());
-        MessageEvent::dispatch_jsval(target, global.r(), message.handle());
+        let _ac = JSAutoCompartment::new(global.get_cx(), target.reflector().get_jsobject().get());
+        rooted!(in(global.get_cx()) let mut message = UndefinedValue());
+        data.read(&global, message.handle_mut());
+        MessageEvent::dispatch_jsval(target, &global, message.handle());
     }
 
     pub fn dispatch_simple_error(address: TrustedWorkerAddress) {