diff --git a/dom/network/TCPSocket.cpp b/dom/network/TCPSocket.cpp
index ba73f1a3a88e..11f44e46ce5f 100644
--- a/dom/network/TCPSocket.cpp
+++ b/dom/network/TCPSocket.cpp
@@ -481,7 +481,7 @@ TCPSocket::FireEvent(const nsAString& aType) {
 
 NS_IMETHODIMP
 TCPSocket::FireDataArrayEvent(const nsAString& aType,
-                              const InfallibleTArray<uint8_t>& buffer) {
+                              const nsTArray<uint8_t>& buffer) {
   AutoJSAPI api;
   if (NS_WARN_IF(!api.Init(GetOwnerGlobal()))) {
     return NS_ERROR_FAILURE;
diff --git a/dom/network/TCPSocketChild.cpp b/dom/network/TCPSocketChild.cpp
index ee78ce6d47e6..0c69deb16bc6 100644
--- a/dom/network/TCPSocketChild.cpp
+++ b/dom/network/TCPSocketChild.cpp
@@ -23,8 +23,7 @@ using mozilla::net::gNeckoChild;
 
 namespace IPC {
 
-bool DeserializeArrayBuffer(JSContext* cx,
-                            const InfallibleTArray<uint8_t>& aBuffer,
+bool DeserializeArrayBuffer(JSContext* cx, const nsTArray<uint8_t>& aBuffer,
                             JS::MutableHandle<JS::Value> aVal) {
   mozilla::UniquePtr<uint8_t[], JS::FreePolicy> data(
       js_pod_arena_malloc<uint8_t>(js::ArrayBufferContentsArena,
@@ -187,7 +186,7 @@ nsresult TCPSocketChild::SendSend(const ArrayBuffer& aData,
     return NS_ERROR_OUT_OF_MEMORY;
   }
 
-  InfallibleTArray<uint8_t> arr;
+  nsTArray<uint8_t> arr;
   arr.SwapElements(fallibleArr);
   SendData(arr, aTrackingNumber);
   return NS_OK;
diff --git a/dom/network/TCPSocketChild.h b/dom/network/TCPSocketChild.h
index 5e8a046c70f3..0d2971076329 100644
--- a/dom/network/TCPSocketChild.h
+++ b/dom/network/TCPSocketChild.h
@@ -16,8 +16,7 @@
 class nsITCPSocketCallback;
 
 namespace IPC {
-bool DeserializeArrayBuffer(JSContext* cx,
-                            const InfallibleTArray<uint8_t>& aBuffer,
+bool DeserializeArrayBuffer(JSContext* cx, const nsTArray<uint8_t>& aBuffer,
                             JS::MutableHandle<JS::Value> aVal);
 }
 
diff --git a/dom/network/TCPSocketParent.cpp b/dom/network/TCPSocketParent.cpp
index 0222193c0c61..d41b630e7820 100644
--- a/dom/network/TCPSocketParent.cpp
+++ b/dom/network/TCPSocketParent.cpp
@@ -23,7 +23,7 @@ namespace IPC {
 
 // Defined in TCPSocketChild.cpp
 extern bool DeserializeArrayBuffer(JSContext* aCx,
-                                   const InfallibleTArray<uint8_t>& aBuffer,
+                                   const nsTArray<uint8_t>& aBuffer,
                                    JS::MutableHandle<JS::Value> aVal);
 
 }  // namespace IPC
@@ -208,7 +208,7 @@ mozilla::ipc::IPCResult TCPSocketParent::RecvData(
     bool allowed;
     MOZ_ASSERT(aData.type() == SendableData::TArrayOfuint8_t,
                "Unsupported data type for filtering");
-    const InfallibleTArray<uint8_t>& data(aData.get_ArrayOfuint8_t());
+    const nsTArray<uint8_t>& data(aData.get_ArrayOfuint8_t());
     nsresult nsrv =
         mFilter->FilterPacket(&addr, data.Elements(), data.Length(),
                               nsISocketFilter::SF_OUTGOING, &allowed);
@@ -271,7 +271,7 @@ void TCPSocketParent::FireEvent(const nsAString& aType,
 
 void TCPSocketParent::FireArrayBufferDataEvent(nsTArray<uint8_t>& aBuffer,
                                                TCPReadyState aReadyState) {
-  InfallibleTArray<uint8_t> arr;
+  nsTArray<uint8_t> arr;
   arr.SwapElements(aBuffer);
 
   if (mFilter) {
diff --git a/dom/network/UDPSocketChild.cpp b/dom/network/UDPSocketChild.cpp
index 695fa61e29a0..88c60f661a1d 100644
--- a/dom/network/UDPSocketChild.cpp
+++ b/dom/network/UDPSocketChild.cpp
@@ -136,7 +136,7 @@ nsresult UDPSocketChild::SendDataInternal(const UDPSocketAddr& aAddr,
     return NS_ERROR_OUT_OF_MEMORY;
   }
 
-  InfallibleTArray<uint8_t> array;
+  nsTArray<uint8_t> array;
   array.SwapElements(fallibleArray);
 
   SendOutgoingData(array, aAddr);
@@ -214,7 +214,7 @@ mozilla::ipc::IPCResult UDPSocketChild::RecvCallbackClosed() {
 }
 
 mozilla::ipc::IPCResult UDPSocketChild::RecvCallbackReceivedData(
-    const UDPAddressInfo& aAddressInfo, InfallibleTArray<uint8_t>&& aData) {
+    const UDPAddressInfo& aAddressInfo, nsTArray<uint8_t>&& aData) {
   UDPSOCKET_LOG(("%s: %s:%u length %zu", __FUNCTION__,
                  aAddressInfo.addr().get(), aAddressInfo.port(),
                  aData.Length()));
diff --git a/dom/network/UDPSocketChild.h b/dom/network/UDPSocketChild.h
index 4747bed5c6c2..226e75b86dfe 100644
--- a/dom/network/UDPSocketChild.h
+++ b/dom/network/UDPSocketChild.h
@@ -88,7 +88,7 @@ class UDPSocketChild : public mozilla::net::PUDPSocketChild,
       const UDPAddressInfo& aAddressInfo);
   mozilla::ipc::IPCResult RecvCallbackClosed();
   mozilla::ipc::IPCResult RecvCallbackReceivedData(
-      const UDPAddressInfo& aAddressInfo, InfallibleTArray<uint8_t>&& aData);
+      const UDPAddressInfo& aAddressInfo, nsTArray<uint8_t>&& aData);
   mozilla::ipc::IPCResult RecvCallbackError(const nsCString& aMessage,
                                             const nsCString& aFilename,
                                             const uint32_t& aLineNumber);
diff --git a/dom/network/UDPSocketParent.cpp b/dom/network/UDPSocketParent.cpp
index 8c4e032f5263..43f2c85abbca 100644
--- a/dom/network/UDPSocketParent.cpp
+++ b/dom/network/UDPSocketParent.cpp
@@ -340,7 +340,7 @@ mozilla::ipc::IPCResult UDPSocketParent::RecvOutgoingData(
     }
 
     bool allowed;
-    const InfallibleTArray<uint8_t>& data(aData.get_ArrayOfuint8_t());
+    const nsTArray<uint8_t>& data(aData.get_ArrayOfuint8_t());
     rv = mFilter->FilterPacket(&aAddr.get_NetAddr(), data.Elements(),
                                data.Length(), nsISocketFilter::SF_OUTGOING,
                                &allowed);
@@ -366,7 +366,7 @@ mozilla::ipc::IPCResult UDPSocketParent::RecvOutgoingData(
   return IPC_OK();
 }
 
-void UDPSocketParent::Send(const InfallibleTArray<uint8_t>& aData,
+void UDPSocketParent::Send(const nsTArray<uint8_t>& aData,
                            const UDPSocketAddr& aAddr) {
   nsresult rv;
   uint32_t count;
@@ -527,7 +527,7 @@ UDPSocketParent::OnPacketReceived(nsIUDPSocket* aSocket,
     FireInternalError(__LINE__);
     return NS_ERROR_OUT_OF_MEMORY;
   }
-  InfallibleTArray<uint8_t> infallibleArray;
+  nsTArray<uint8_t> infallibleArray;
   infallibleArray.SwapElements(fallibleArray);
 
   // compose callback
diff --git a/dom/network/UDPSocketParent.h b/dom/network/UDPSocketParent.h
index 7427c0301a0d..7d0fd5922da6 100644
--- a/dom/network/UDPSocketParent.h
+++ b/dom/network/UDPSocketParent.h
@@ -58,7 +58,7 @@ class UDPSocketParent : public mozilla::net::PUDPSocketParent,
   virtual ~UDPSocketParent();
 
   virtual void ActorDestroy(ActorDestroyReason why) override;
-  void Send(const InfallibleTArray<uint8_t>& aData, const UDPSocketAddr& aAddr);
+  void Send(const nsTArray<uint8_t>& aData, const UDPSocketAddr& aAddr);
   void Send(const IPCStream& aStream, const UDPSocketAddr& aAddr);
   nsresult BindInternal(const nsCString& aHost, const uint16_t& aPort,
                         const bool& aAddressReuse, const bool& aLoopback,
diff --git a/dom/network/interfaces/nsITCPSocketCallback.idl b/dom/network/interfaces/nsITCPSocketCallback.idl
index 1c64b4c0fa1f..9c960a178168 100644
--- a/dom/network/interfaces/nsITCPSocketCallback.idl
+++ b/dom/network/interfaces/nsITCPSocketCallback.idl
@@ -14,7 +14,7 @@
 %{C++
 #include "nsTArrayForwardDeclare.h"
 %}
-[ref] native nsUint8TArrayRef(InfallibleTArray<uint8_t>);
+[ref] native nsUint8TArrayRef(nsTArray<uint8_t>);
 [ptr] native JSContextPtr(JSContext);