How to block a site in a browser? without extensions and for sure?

Question

Browsers

Please advise without references to nonsense

Answer 1

via hosts

Answer 2

You can add an entry to hosts

127.0.0.1 sitename.ru
127.0.0.1 www.sitename.ru

Answer 3

in the router)

Answer 4

if you use windows then in "family safety" or add it to the prohibited rules in the firewall