A simple setting to add websites to a block list

Please create a setting in which you can add websites you want to put onto a Block list. Not necessarily password protected but an option to would be logical.

This would be a better instead of third party blockers or sheilds, or home router block lists because it would be a more customizable option for people to choose the sites they want to block.
Many people have children, bad habits, or addictions such as gambling, shopping, games, adult content, etc that having extra steps to gain access or even none at all to prevent them or remind them to deter away.