2 files changed, 8 insertions, 2 deletions
diff --git a/dom/indexedDB/IDBFactory.cpp b/dom/indexedDB/IDBFactory.cpp
index 51d4c4df23..c0dc5aeab2 100644
--- a/dom/indexedDB/IDBFactory.cpp
+++ b/dom/indexedDB/IDBFactory.cpp
@@ -470,7 +470,13 @@ RefPtr<IDBOpenDBRequest> IDBFactory::DeleteDatabase(
                       /* aDeleting */ true, aCallerType, aRv);
 }
 
-already_AddRefed<Promise> IDBFactory::Databases(JSContext* const aCx) {
+already_AddRefed<Promise> IDBFactory::Databases(JSContext* const aCx,
+                                                ErrorResult& aRv) {
+  if (NS_WARN_IF(!GetOwnerGlobal())) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
+    return nullptr;
+  }
+
   RefPtr<Promise> promise = Promise::CreateInfallible(GetOwnerGlobal());
 
   // Nothing can be done here if we have previously failed to create a
diff --git a/dom/indexedDB/IDBFactory.h b/dom/indexedDB/IDBFactory.h
index 7139b26f9c..d64d571a05 100644
--- a/dom/indexedDB/IDBFactory.h
+++ b/dom/indexedDB/IDBFactory.h
@@ -162,7 +162,7 @@ class IDBFactory final : public GlobalTeardownObserver, public nsWrapperCache {
       JSContext* aCx, const nsAString& aName, const IDBOpenDBOptions& aOptions,
       CallerType aCallerType, ErrorResult& aRv);
 
-  already_AddRefed<Promise> Databases(JSContext* aCx);
+  already_AddRefed<Promise> Databases(JSContext* aCx, ErrorResult& aRv);
 
   int16_t Cmp(JSContext* aCx, JS::Handle<JS::Value> aFirst,
               JS::Handle<JS::Value> aSecond, ErrorResult& aRv);