--- a/dom/media/gmp/GMPServiceParent.cpp
+++ b/dom/media/gmp/GMPServiceParent.cpp
@@ -714,17 +714,17 @@ GeckoMediaPluginServiceParent::UnloadPlu
         NS_LITERAL_CSTRING("Starting to unload plugins"));
 #endif
 
   nsTArray<RefPtr<GMPParent>> plugins;
   {
     MutexAutoLock lock(mMutex);
     // Move all plugins references to a local array. This way mMutex won't be
     // locked when calling CloseActive (to avoid inter-locking).
-    plugins = Move(mPlugins);
+    Swap(plugins, mPlugins);
   }
 
   LOGD(("%s::%s plugins:%u including async:%u", __CLASS__, __FUNCTION__,
         plugins.Length(), mAsyncShutdownPlugins.Length()));
 #ifdef DEBUG
   for (const auto& plugin : plugins) {
     LOGD(("%s::%s plugin: '%s'", __CLASS__, __FUNCTION__,
           plugin->GetDisplayName().get()));