My sunvisor does not have a pull out extension, the whole visor slides on its mounting pole so that when you turn it 90 to the side you can slide the whole visor so that you ears don't get burnt.
BTW - in the US we get visors with a dumb no-removable sticker on them telling us that the car has an airbag. It's the price we pay for having colleges churn out lawyers who have no useful alternative at making a living.