diff --git a/dom/base/nsGlobalWindowOuter.cpp b/dom/base/nsGlobalWindowOuter.cpp
index bda3c526ecbb..ae7bd979df1c 100644
--- a/dom/base/nsGlobalWindowOuter.cpp
+++ b/dom/base/nsGlobalWindowOuter.cpp
@@ -2603,7 +2603,7 @@ nsPIDOMWindowOuter::SetFrameElementInternal(Element* aFrameElement)
   mFrameElement = aFrameElement;
 }
 
-nsIDOMNavigator*
+Navigator*
 nsGlobalWindowOuter::GetNavigator()
 {
   FORWARD_TO_INNER(Navigator, (), nullptr);
diff --git a/dom/base/nsGlobalWindowOuter.h b/dom/base/nsGlobalWindowOuter.h
index 5a208ed1896a..ca7ab07f3444 100644
--- a/dom/base/nsGlobalWindowOuter.h
+++ b/dom/base/nsGlobalWindowOuter.h
@@ -608,7 +608,7 @@ public:
                 nsIDocShellLoadInfo* aLoadInfo,
                 bool aForceNoOpener,
                 nsPIDOMWindowOuter **_retval) override;
-  nsIDOMNavigator* GetNavigator() override;
+  mozilla::dom::Navigator* GetNavigator() override;
 
 #if defined(MOZ_WIDGET_ANDROID)
   int16_t Orientation(mozilla::dom::CallerType aCallerType) const;
diff --git a/dom/base/nsPIDOMWindow.h b/dom/base/nsPIDOMWindow.h
index 56094af4f3e2..d33a5f258470 100644
--- a/dom/base/nsPIDOMWindow.h
+++ b/dom/base/nsPIDOMWindow.h
@@ -1101,7 +1101,7 @@ public:
   // XXX(nika): These feel like they should be inner window only, but they're
   // called on the outer window.
   virtual nsIDOMScreen* GetScreen() = 0;
-  virtual nsIDOMNavigator* GetNavigator() = 0;
+  virtual mozilla::dom::Navigator* GetNavigator() = 0;
   virtual mozilla::dom::Location* GetLocation() = 0;
 
   virtual nsresult GetPrompter(nsIPrompt** aPrompt) = 0;
diff --git a/netwerk/protocol/http/nsHttpHandler.cpp b/netwerk/protocol/http/nsHttpHandler.cpp
index e2515c958e54..698981e0e70b 100644
--- a/netwerk/protocol/http/nsHttpHandler.cpp
+++ b/netwerk/protocol/http/nsHttpHandler.cpp
@@ -16,8 +16,6 @@
 #include "nsHttpAuthCache.h"
 #include "nsStandardURL.h"
 #include "nsIDOMWindow.h"
-#include "nsIDOMNavigator.h"
-#include "nsIMozNavigatorNetwork.h"
 #include "nsINetworkProperties.h"
 #include "nsIHttpChannel.h"
 #include "nsIStandardURL.h"
@@ -69,6 +67,7 @@
 #include "mozilla/BasePrincipal.h"
 
 #include "mozilla/dom/ContentParent.h"
+#include "mozilla/dom/Navigator.h"
 
 #include "nsNSSComponent.h"
 
@@ -2655,14 +2654,12 @@ nsHttpHandler::TickleWifi(nsIInterfaceRequestor *cb)
     if (!piWindow)
         return;
 
-    nsCOMPtr<nsIDOMNavigator> domNavigator = piWindow->GetNavigator();
-    nsCOMPtr<nsIMozNavigatorNetwork> networkNavigator =
-        do_QueryInterface(domNavigator);
-    if (!networkNavigator)
+    RefPtr<dom::Navigator> navigator = piWindow->GetNavigator();
+    if (!navigator)
         return;
 
     nsCOMPtr<nsINetworkProperties> networkProperties;
-    networkNavigator->GetProperties(getter_AddRefs(networkProperties));
+    navigator->GetProperties(getter_AddRefs(networkProperties));
     if (!networkProperties)
         return;