I have problem with my TESCO Online shopping account opening in Firefox. After opening an order to update it the shopping list appears on righthand side for a few seconds and then disappears. I attempted to add another item but nothing appeared to happen. Rang Tesco's help line and they suggested trying Microsoft Internet Explorer. Did this and everything was ok - shopping list remained on screen and the item I had tried to add in Firefox was there when the list opened. I have used Firefox previously to create a Tesco order with no problems. Thx in advance for any help/suggestions.