I updated WooCommerce from 2.0.13 to 2.0.14.
Then I found that "Update cart" and "Checkout" does not work on Firefox. It works on Chrome and IE.
So I downgraded back to 2.0.13. But "Update cart" and "Checkout" still does not working - it keeps saying the cart is empty.
Does anybody know why it does not work on Firefox only?