diff --git a/dom/network/TCPSocketParent.cpp b/dom/network/TCPSocketParent.cpp
index 662022ce505c..768fcdb55f40 100644
--- a/dom/network/TCPSocketParent.cpp
+++ b/dom/network/TCPSocketParent.cpp
@@ -64,14 +64,10 @@ NS_IMPL_CYCLE_COLLECTING_RELEASE(TCPSocketParentBase)
 TCPSocketParentBase::TCPSocketParentBase()
 : mIPCOpen(false)
 {
-  mObserver = new mozilla::net::OfflineObserver(this);
 }
 
 TCPSocketParentBase::~TCPSocketParentBase()
 {
-  if (mObserver) {
-    mObserver->RemoveObserver();
-  }
 }
 
 uint32_t
@@ -98,33 +94,6 @@ TCPSocketParent::GetInIsolatedMozBrowser()
   }
 }
 
-nsresult
-TCPSocketParent::OfflineNotification(nsISupports *aSubject)
-{
-  nsCOMPtr<nsIAppOfflineInfo> info(do_QueryInterface(aSubject));
-  if (!info) {
-    return NS_OK;
-  }
-
-  uint32_t targetAppId = nsIScriptSecurityManager::UNKNOWN_APP_ID;
-  info->GetAppId(&targetAppId);
-
-  // Obtain App ID
-  uint32_t appId = GetAppId();
-  if (appId != targetAppId) {
-    return NS_OK;
-  }
-
-  // If the app is offline, close the socket
-  if (mSocket && NS_IsAppOffline(appId)) {
-    mSocket->Close();
-    mSocket = nullptr;
-  }
-
-  return NS_OK;
-}
-
-
 void
 TCPSocketParentBase::ReleaseIPDLReference()
 {
@@ -167,12 +136,6 @@ TCPSocketParent::RecvOpen(const nsString& aHost, const uint16_t& aPort, const bo
   uint32_t appId = GetAppId();
   bool     inIsolatedMozBrowser = GetInIsolatedMozBrowser();
 
-  if (NS_IsAppOffline(appId)) {
-    NS_ERROR("Can't open socket because app is offline");
-    FireInteralError(this, __LINE__);
-    return true;
-  }
-
   mSocket = new TCPSocket(nullptr, aHost, aPort, aUseSSL, aUseArrayBuffers);
   mSocket->SetAppIdAndBrowser(appId, inIsolatedMozBrowser);
   mSocket->SetSocketBridgeParent(this);
diff --git a/dom/network/TCPSocketParent.h b/dom/network/TCPSocketParent.h
index 27f44968ac0e..e44e340bbf2b 100644
--- a/dom/network/TCPSocketParent.h
+++ b/dom/network/TCPSocketParent.h
@@ -13,7 +13,6 @@
 #include "nsCOMPtr.h"
 #include "nsISocketFilter.h"
 #include "js/TypeDecls.h"
-#include "mozilla/net/OfflineObserver.h"
 
 #define TCPSOCKETPARENT_CID \
   { 0x4e7246c6, 0xa8b3, 0x426d, { 0x9c, 0x17, 0x76, 0xda, 0xb1, 0xe1, 0xe1, 0x4a } }
@@ -24,7 +23,6 @@ namespace dom {
 class TCPSocket;
 
 class TCPSocketParentBase : public nsISupports
-                          , public mozilla::net::DisconnectableParent
 {
 public:
   NS_DECL_CYCLE_COLLECTION_CLASS(TCPSocketParentBase)
@@ -38,7 +36,6 @@ protected:
   virtual ~TCPSocketParentBase();
 
   RefPtr<TCPSocket> mSocket;
-  RefPtr<mozilla::net::OfflineObserver> mObserver;
   bool mIPCOpen;
 };
 
@@ -68,8 +65,6 @@ public:
   virtual bool RecvData(const SendableData& aData,
                         const uint32_t& aTrackingNumber) override;
   virtual bool RecvRequestDelete() override;
-  virtual nsresult OfflineNotification(nsISupports *) override;
-  virtual uint32_t GetAppId() override;
   bool GetInIsolatedMozBrowser();
 
   void FireErrorEvent(const nsAString& aName, const nsAString& aType, TCPReadyState aReadyState);
@@ -82,6 +77,7 @@ public:
   nsresult GetPort(uint16_t* aPort);
 
 private:
+  virtual uint32_t GetAppId();
   virtual void ActorDestroy(ActorDestroyReason why) override;
   void SendEvent(const nsAString& aType, CallbackData aData, TCPReadyState aReadyState);
   nsresult SetFilter(const nsCString& aFilter);
diff --git a/dom/network/UDPSocketParent.cpp b/dom/network/UDPSocketParent.cpp
index d917dd08a13d..886af32c1993 100644
--- a/dom/network/UDPSocketParent.cpp
+++ b/dom/network/UDPSocketParent.cpp
@@ -15,9 +15,6 @@
 #include "mozilla/net/DNS.h"
 #include "mozilla/net/NeckoCommon.h"
 #include "mozilla/net/PNeckoParent.h"
-#include "nsNetUtil.h"
-#include "mozilla/dom/ContentParent.h"
-#include "mozilla/dom/TabParent.h"
 #include "nsIPermissionManager.h"
 #include "nsIScriptSecurityManager.h"
 #include "mozilla/ipc/PBackgroundParent.h"
@@ -33,7 +30,6 @@ UDPSocketParent::UDPSocketParent(PBackgroundParent* aManager)
   , mNeckoManager(nullptr)
   , mIPCOpen(true)
 {
-  mObserver = new mozilla::net::OfflineObserver(this);
 }
 
 UDPSocketParent::UDPSocketParent(PNeckoParent* aManager)
@@ -41,46 +37,10 @@ UDPSocketParent::UDPSocketParent(PNeckoParent* aManager)
   , mNeckoManager(aManager)
   , mIPCOpen(true)
 {
-  mObserver = new mozilla::net::OfflineObserver(this);
 }
 
 UDPSocketParent::~UDPSocketParent()
 {
-  if (mObserver) {
-    mObserver->RemoveObserver();
-  }
-}
-
-nsresult
-UDPSocketParent::OfflineNotification(nsISupports *aSubject)
-{
-  nsCOMPtr<nsIAppOfflineInfo> info(do_QueryInterface(aSubject));
-  if (!info) {
-    return NS_OK;
-  }
-
-  uint32_t targetAppId = nsIScriptSecurityManager::UNKNOWN_APP_ID;
-  info->GetAppId(&targetAppId);
-
-  // Obtain App ID
-  uint32_t appId = GetAppId();
-  if (appId != targetAppId) {
-    return NS_OK;
-  }
-
-  // If the app is offline, close the socket
-  if (mSocket && NS_IsAppOffline(appId)) {
-    mSocket->Close();
-  }
-
-  return NS_OK;
-}
-
-uint32_t
-UDPSocketParent::GetAppId()
-{
-  return mPrincipal ? mPrincipal->GetAppId()
-                    : nsIScriptSecurityManager::UNKNOWN_APP_ID;
 }
 
 bool
diff --git a/dom/network/UDPSocketParent.h b/dom/network/UDPSocketParent.h
index 5795d8c8fe38..4b828e0133be 100644
--- a/dom/network/UDPSocketParent.h
+++ b/dom/network/UDPSocketParent.h
@@ -11,7 +11,6 @@
 #include "nsCOMPtr.h"
 #include "nsIUDPSocket.h"
 #include "nsISocketFilter.h"
-#include "mozilla/net/OfflineObserver.h"
 #include "mozilla/dom/PermissionMessageUtils.h"
 
 namespace mozilla {
@@ -23,7 +22,6 @@ namespace dom {
 
 class UDPSocketParent : public mozilla::net::PUDPSocketParent
                       , public nsIUDPSocketListener
-                      , public mozilla::net::DisconnectableParent
 {
 public:
   NS_DECL_THREADSAFE_ISUPPORTS
@@ -54,8 +52,6 @@ public:
                                  const nsCString& aInterface) override;
   virtual bool RecvLeaveMulticast(const nsCString& aMulticastAddress,
                                   const nsCString& aInterface) override;
-  virtual nsresult OfflineNotification(nsISupports *) override;
-  virtual uint32_t GetAppId() override;
 
 private:
   virtual ~UDPSocketParent();
@@ -79,7 +75,6 @@ private:
   bool mIPCOpen;
   nsCOMPtr<nsIUDPSocket> mSocket;
   nsCOMPtr<nsISocketFilter> mFilter;
-  RefPtr<mozilla::net::OfflineObserver> mObserver;
   nsCOMPtr<nsIPrincipal> mPrincipal;
 };