--- a/widget/GfxInfoBase.cpp
+++ b/widget/GfxInfoBase.cpp
@@ -586,17 +586,20 @@ GfxInfoBase::~GfxInfoBase()
 {
 }
 
 nsresult
 GfxInfoBase::Init()
 {
   InitGfxDriverInfoShutdownObserver();
   gfxPrefs::GetSingleton();
-  MediaPrefs::GetSingleton();
+  if (!XRE_IsGPUProcess()) {
+    // MediaPrefs can't run in the GPU process.
+    MediaPrefs::GetSingleton();
+  }
 
   nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
   if (os) {
     os->AddObserver(this, "blocklist-data-gfxItems", true);
   }
 
   return NS_OK;
 }