Actually, network firewalls have nothing to do with website paths at all, but that is how the parent was using the term, so clearly they were thinking in terms

Actually, network firewalls have nothing to do with website paths at all, but that is how the parent was using the term, so clearly they were thinking in terms of a more ambiguous term like sandboxing or isolation. Not looking to be pedantic, but by conflating the two terms, the parent was confusing both themselves and others -- and giving dangerously insecure advice.