RemoteStorage.js:Private browsing mode
remoteStorage.js supports Private/Incognito browsing mode in modern browsers. However, depending on browser support it cannot use all or any local Web Storage backends.
IndexedDB and localStorage are stubbed but not functional in Private windows (in version 9.1). RS.js stores all data in memory, so it is lost when connecting a remote storage (except for the WebFinger discovery data, which is transported via the OAuth
Caveat: do not get fooled by Safari's Web Inspector. It displays the localStorage content for the origin, but not IndexedDB.