5ce18e7ab5
A renderer dump taken after a quick-unlock, with nothing opened, contained the auto-backup password in cleartext - inside an ExecuteJavaScript string and in the DevTools protocol buffers - and it survived the auto-lock that wipes the vault key. New prefs/has answers set-or-not without moving the value. The settings panel uses that; only the paths that encrypt a backup, test the WebDAV connection or run a sync fetch the secrets themselves.