When using either Firefox (v. 23.0.1) or Chrome (v. 29.0.1547.66 m), items added to the shopping cart do not save. You can add an item to the cart but as soon as you either change pages, try to check out or even just add another item, the items don't stay in the cart. I don't have this problem in IE 10.
Using PrestShop 5.1.1
Ajax is turned on
I haven't touched the code, everything has been done through the back office
Unix server
Has anybody seen this before?
JD