0001: extra info re starting in PB mode
0001: extra info re starting in PB mode

Because PB mode still allows the key-commands/menus/context menus/buttons to do both "new window" and "new private window", and because in this mode the PB mode purple mask icon is never shown, this is not clear. See issue #73
ghacksuserjs/ghacks-user.js,ghacksuserjs/ghacks-user.js