Hello,

 

Ive been looking for hours and carnt seem to solve the problem, In firefox the products are out of place..

http://www.scrumptioussweets.co.uk

On the assumption that the container is wide enough for four product items (it seems to be) I think it's because you haven't cleared the floats after each fourth item. It seems that it's all part of a list so you may have to add a tag which is the width of four product items and add in this extra full width tag between the rows of four to separate them.