--- a/dom/media/CubebUtils.cpp
+++ b/dom/media/CubebUtils.cpp
@@ -162,17 +162,22 @@ void InitBrandName()
 
 cubeb* GetCubebContextUnlocked()
 {
   sMutex.AssertCurrentThreadOwns();
   if (sCubebContext) {
     return sCubebContext;
   }
 
-  NS_WARN_IF_FALSE(sBrandName, "Could not get brandName?");
+  if (!sBrandName && NS_IsMainThread()) {
+    InitBrandName();
+  } else {
+    NS_WARN_IF_FALSE(sBrandName,
+        "Did not initialize sbrandName, and not on the main thread?");
+  }
 
   DebugOnly<int> rv = cubeb_init(&sCubebContext, sBrandName);
   NS_WARN_IF_FALSE(rv == CUBEB_OK, "Could not get a cubeb context.");
 
   return sCubebContext;
 }
 
 void ReportCubebBackendUsed()