diff --git a/image/imgLoader.cpp b/image/imgLoader.cpp
index 50491aea6e78..93a181c70999 100644
--- a/image/imgLoader.cpp
+++ b/image/imgLoader.cpp
@@ -2192,6 +2192,18 @@ imgLoader::LoadImage(nsIURI* aURI,
         request->SetCacheEntry(entry);
 
         if (mCacheTracker) {
+          if (MOZ_UNLIKELY(!entry->GetExpirationState()->IsTracked())) {
+            bool inCache = false;
+            RefPtr<imgCacheEntry> e;
+            if (cache.Get(key, getter_AddRefs(e)) && e) {
+              inCache = (e == entry);
+            }
+            gfxCriticalNoteOnce << "entry with no proxies is no in tracker "
+                                << "request->HasConsumers() "
+                                << (request->HasConsumers() ? "true" : "false")
+                                << " inCache " << (inCache ? "true" : "false");
+          }
+
           mCacheTracker->MarkUsed(entry);
         }
       }