diff --git a/dom/presentation/PresentationSessionInfo.cpp b/dom/presentation/PresentationSessionInfo.cpp
index 3ff9b1de6624..2db21b31e1a7 100644
--- a/dom/presentation/PresentationSessionInfo.cpp
+++ b/dom/presentation/PresentationSessionInfo.cpp
@@ -34,9 +34,6 @@
 #  include "nsIPresentationNetworkHelper.h"
 #endif  // MOZ_WIDGET_ANDROID
 
-using namespace mozilla;
-using namespace mozilla::dom;
-
 /*
  * Implementation of PresentationChannelDescription
  */
@@ -128,9 +125,6 @@ class TCPPresentationChannelDescription final
   uint16_t mPort;
 };
 
-}  // namespace dom
-}  // namespace mozilla
-
 NS_IMPL_ISUPPORTS(TCPPresentationChannelDescription,
                   nsIPresentationChannelDescription)
 
@@ -1537,3 +1531,6 @@ void PresentationPresentingInfo::RejectedCallback(
 
   ReplyError(NS_ERROR_DOM_OPERATION_ERR);
 }
+
+}  // namespace dom
+}  // namespace mozilla