Simple test to open IndexedDB database in private browsing mode. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB; FAIL indexedDB.open('db') should be null. Was [object IDBOpenDBRequest]. PASS successfullyParsed is true Some tests failed. TEST COMPLETE