How do i keep my history/settings/cookies

I have a issue with ne mozilla resetting cookies every time im linked to a new page. Lets say i go to a store online. First i have to accept cookies so i do, now i go to a specific item in the store. The question about cookies reappears, i put yhe item in my cart, i go to my cart and now the page asks me abput cookies again and the item has disappeared from the cart. I have enabled cookies in the settings but still every page i go to asks me abput cookies no matter how many times i accept them. Its like every time i go to a url mozilla resets every setting i have and can't keep the history nor selections i have made for every page.