Blocking Websites On Your Mac Using Terminal (#1573)
У вашего броузера проблема в совместимости с HTML5
https://macmost.com/e-1573 If you want to prevent yourself from going to a website you can manually block a domain using the Terminal. To do so, you must edit your hosts file and redirect a domain to your local address. This could be useful to help you resist distractions while getting work done.