Steps to reproduce: - With an open Firefox window in the foreground - Enter keyboard shortcut: Command-N Expected behaviour: - New window opens with keyboard focus on the location field - Keys enters appear immediately as text in the location field Observed behaviour: - New Firefox window opens without keyboard focus in the location field - Keys typed are not entered into the location field Further observations: - Entering Command-L focuses the location field as expected - Opening a new *private* window *does* place keyboard focus in the location field - All installed extensions are permitted in private windows