How do browsers know where on a list I left off?

Question

So when I’m browsing through a website with a list of items for sale and I click on an item, then press back. How does it know where on the list was I?
Some websites aren’t able to remember it but some are, how?

In: 2

Answer 1

This can be done by storing the data in a cookie or more likely, stored in cache that persists across the whole site. It’s where user credentials are often stored.