--- a/dom/base/nsFrameMessageManager.cpp
+++ b/dom/base/nsFrameMessageManager.cpp
@@ -615,16 +615,21 @@ nsFrameMessageManager::SendMessage(const
                                    JS::Handle<JS::Value> aJSON,
                                    JS::Handle<JS::Value> aObjects,
                                    nsIPrincipal* aPrincipal,
                                    JSContext* aCx,
                                    uint8_t aArgc,
                                    JS::MutableHandle<JS::Value> aRetval,
                                    bool aIsSync)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMessageName);
+  PROFILER_LABEL_DYNAMIC("nsFrameMessageManager", "SendMessage",
+                          js::ProfileEntry::Category::EVENTS,
+                          messageNameCStr.get());
+
   NS_ASSERTION(!IsGlobal(), "Should not call SendSyncMessage in chrome");
   NS_ASSERTION(!IsBroadcaster(), "Should not call SendSyncMessage in chrome");
   NS_ASSERTION(!mParentManager, "Should not have parent manager in content!");
 
   aRetval.setUndefined();
   NS_ENSURE_TRUE(mCallback, NS_ERROR_NOT_INITIALIZED);
 
   if (sSendingSyncMessage && aIsSync) {

--- a/dom/ipc/ContentChild.cpp
+++ b/dom/ipc/ContentChild.cpp
@@ -194,16 +194,17 @@
 #include "mozilla/widget/PuppetBidiKeyboard.h"
 #include "mozilla/RemoteSpellCheckEngineChild.h"
 #include "GMPServiceChild.h"
 #include "GfxInfoBase.h"
 #include "gfxPlatform.h"
 #include "nscore.h" // for NS_FREE_PERMANENT_DATA
 #include "VRManagerChild.h"
 #include "private/pprio.h"
+#include "nsString.h"
 
 #ifdef MOZ_WIDGET_GTK
 #include "nsAppRunner.h"
 #endif
 #ifdef MOZ_CRASHREPORTER
 #include "mozilla/ipc/CrashReporterClient.h"
 #endif
 
@@ -2132,16 +2133,21 @@ ContentChild::RecvLoadProcessScript(cons
 }
 
 mozilla::ipc::IPCResult
 ContentChild::RecvAsyncMessage(const nsString& aMsg,
                                InfallibleTArray<CpowEntry>&& aCpows,
                                const IPC::Principal& aPrincipal,
                                const ClonedMessageData& aData)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMsg);
+  PROFILER_LABEL_DYNAMIC("ContentChild", "RecvAsyncMessage",
+                        js::ProfileEntry::Category::EVENTS,
+                        messageNameCStr.get());
+
   CrossProcessCpowHolder cpows(this, aCpows);
   RefPtr<nsFrameMessageManager> cpm =
     nsFrameMessageManager::GetChildProcessManager();
   if (cpm) {
     StructuredCloneData data;
     ipc::UnpackClonedMessageDataForChild(aData, data);
     cpm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(cpm.get()),
                         nullptr, aMsg, false, &data, &cpows, aPrincipal,

--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -115,16 +115,17 @@
 #include "FrameLayerBuilder.h"
 #include "VRManagerChild.h"
 #include "nsICommandParams.h"
 #include "nsISHistory.h"
 #include "nsQueryObject.h"
 #include "GroupedSHistory.h"
 #include "nsIHttpChannel.h"
 #include "mozilla/dom/DocGroup.h"
+#include "nsString.h"
 #include "nsISupportsPrimitives.h"
 #include "mozilla/Telemetry.h"
 
 #ifdef XP_WIN
 #include "mozilla/plugins/PluginWidgetChild.h"
 #endif
 
 #ifdef NS_PRINTING
@@ -2193,16 +2194,21 @@ TabChild::RecvLoadRemoteScript(const nsS
 }
 
 mozilla::ipc::IPCResult
 TabChild::RecvAsyncMessage(const nsString& aMessage,
                            InfallibleTArray<CpowEntry>&& aCpows,
                            const IPC::Principal& aPrincipal,
                            const ClonedMessageData& aData)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMessage);
+  PROFILER_LABEL_DYNAMIC("TabChild", "RecvAsyncMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   CrossProcessCpowHolder cpows(Manager(), aCpows);
   if (!mTabChildGlobal) {
     return IPC_OK();
   }
 
   // We should have a message manager if the global is alive, but it
   // seems sometimes we don't.  Assert in aurora/nightly, but don't
   // crash in release builds.

--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -93,16 +93,17 @@
 #include "nsIAuthPrompt2.h"
 #include "gfxDrawable.h"
 #include "ImageOps.h"
 #include "UnitTransforms.h"
 #include <algorithm>
 #include "mozilla/WebBrowserPersistDocumentParent.h"
 #include "nsIGroupedSHistory.h"
 #include "PartialSHistory.h"
+#include "nsString.h"
 
 #ifdef XP_WIN
 #include "mozilla/plugins/PluginWidgetParent.h"
 #endif
 
 #if defined(XP_WIN) && defined(ACCESSIBILITY)
 #include "mozilla/a11y/AccessibleWrap.h"
 #include "mozilla/a11y/nsWinUtils.h"
@@ -1560,16 +1561,21 @@ TabParent::SendHandleTap(TapType aType,
 
 mozilla::ipc::IPCResult
 TabParent::RecvSyncMessage(const nsString& aMessage,
                            const ClonedMessageData& aData,
                            InfallibleTArray<CpowEntry>&& aCpows,
                            const IPC::Principal& aPrincipal,
                            nsTArray<StructuredCloneData>* aRetVal)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMessage);
+  PROFILER_LABEL_DYNAMIC("TabParent", "RecvSyncMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   StructuredCloneData data;
   ipc::UnpackClonedMessageDataForParent(aData, data);
 
   CrossProcessCpowHolder cpows(Manager(), aCpows);
   if (!ReceiveMessage(aMessage, true, &data, &cpows, aPrincipal, aRetVal)) {
     return IPC_FAIL_NO_REASON(this);
   }
   return IPC_OK();
@@ -1577,32 +1583,42 @@ TabParent::RecvSyncMessage(const nsStrin
 
 mozilla::ipc::IPCResult
 TabParent::RecvRpcMessage(const nsString& aMessage,
                           const ClonedMessageData& aData,
                           InfallibleTArray<CpowEntry>&& aCpows,
                           const IPC::Principal& aPrincipal,
                           nsTArray<StructuredCloneData>* aRetVal)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMessage);
+  PROFILER_LABEL_DYNAMIC("TabParent", "RecvRpcMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   StructuredCloneData data;
   ipc::UnpackClonedMessageDataForParent(aData, data);
 
   CrossProcessCpowHolder cpows(Manager(), aCpows);
   if (!ReceiveMessage(aMessage, true, &data, &cpows, aPrincipal, aRetVal)) {
     return IPC_FAIL_NO_REASON(this);
   }
   return IPC_OK();
 }
 
 mozilla::ipc::IPCResult
 TabParent::RecvAsyncMessage(const nsString& aMessage,
                             InfallibleTArray<CpowEntry>&& aCpows,
                             const IPC::Principal& aPrincipal,
                             const ClonedMessageData& aData)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMessage);
+  PROFILER_LABEL_DYNAMIC("TabParent", "RecvAsyncMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   StructuredCloneData data;
   ipc::UnpackClonedMessageDataForParent(aData, data);
 
   CrossProcessCpowHolder cpows(Manager(), aCpows);
   if (!ReceiveMessage(aMessage, false, &data, &cpows, aPrincipal, nullptr)) {
     return IPC_FAIL_NO_REASON(this);
   }
   return IPC_OK();

--- a/dom/ipc/nsIContentChild.cpp
+++ b/dom/ipc/nsIContentChild.cpp
@@ -179,16 +179,21 @@ nsIContentChild::DeallocPFileDescriptorS
 }
 
 mozilla::ipc::IPCResult
 nsIContentChild::RecvAsyncMessage(const nsString& aMsg,
                                   InfallibleTArray<CpowEntry>&& aCpows,
                                   const IPC::Principal& aPrincipal,
                                   const ClonedMessageData& aData)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMsg);
+  PROFILER_LABEL_DYNAMIC("nsIContentChild", "RecvAsyncMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   CrossProcessCpowHolder cpows(this, aCpows);
   RefPtr<nsFrameMessageManager> cpm = nsFrameMessageManager::GetChildProcessManager();
   if (cpm) {
     ipc::StructuredCloneData data;
     ipc::UnpackClonedMessageDataForChild(aData, data);
 
     cpm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(cpm.get()), nullptr,
                         aMsg, false, &data, &cpows, aPrincipal, nullptr);

--- a/dom/ipc/nsIContentParent.cpp
+++ b/dom/ipc/nsIContentParent.cpp
@@ -213,16 +213,21 @@ nsIContentParent::GetOrCreateActorForBlo
 
 mozilla::ipc::IPCResult
 nsIContentParent::RecvSyncMessage(const nsString& aMsg,
                                   const ClonedMessageData& aData,
                                   InfallibleTArray<CpowEntry>&& aCpows,
                                   const IPC::Principal& aPrincipal,
                                   nsTArray<ipc::StructuredCloneData>* aRetvals)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMsg);
+  PROFILER_LABEL_DYNAMIC("nsIContentParent", "RecvSyncMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   CrossProcessCpowHolder cpows(this, aCpows);
   RefPtr<nsFrameMessageManager> ppm = mMessageManager;
   if (ppm) {
     ipc::StructuredCloneData data;
     ipc::UnpackClonedMessageDataForParent(aData, data);
 
     ppm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(ppm.get()), nullptr,
                         aMsg, true, &data, &cpows, aPrincipal, aRetvals);
@@ -232,16 +237,21 @@ nsIContentParent::RecvSyncMessage(const 
 
 mozilla::ipc::IPCResult
 nsIContentParent::RecvRpcMessage(const nsString& aMsg,
                                  const ClonedMessageData& aData,
                                  InfallibleTArray<CpowEntry>&& aCpows,
                                  const IPC::Principal& aPrincipal,
                                  nsTArray<ipc::StructuredCloneData>* aRetvals)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMsg);
+  PROFILER_LABEL_DYNAMIC("nsIContentParent", "RecvRpcMessage",
+                         js::ProfileEntry::Category::EVENTS,
+                         messageNameCStr.get());
+
   CrossProcessCpowHolder cpows(this, aCpows);
   RefPtr<nsFrameMessageManager> ppm = mMessageManager;
   if (ppm) {
     ipc::StructuredCloneData data;
     ipc::UnpackClonedMessageDataForParent(aData, data);
 
     ppm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(ppm.get()), nullptr,
                         aMsg, true, &data, &cpows, aPrincipal, aRetvals);
@@ -289,16 +299,21 @@ nsIContentParent::DeallocPParentToChildS
 }
 
 mozilla::ipc::IPCResult
 nsIContentParent::RecvAsyncMessage(const nsString& aMsg,
                                    InfallibleTArray<CpowEntry>&& aCpows,
                                    const IPC::Principal& aPrincipal,
                                    const ClonedMessageData& aData)
 {
+  NS_LossyConvertUTF16toASCII messageNameCStr(aMsg);
+  PROFILER_LABEL_DYNAMIC("nsIContentParent", "RecvAsyncMessage",
+                          js::ProfileEntry::Category::EVENTS,
+                          messageNameCStr.get());
+
   CrossProcessCpowHolder cpows(this, aCpows);
   RefPtr<nsFrameMessageManager> ppm = mMessageManager;
   if (ppm) {
     ipc::StructuredCloneData data;
     ipc::UnpackClonedMessageDataForParent(aData, data);
 
     ppm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(ppm.get()), nullptr,
                         aMsg, false, &data, &cpows, aPrincipal, nullptr);