нельзя поставить пароль, для детей. Да и от самого себя. Просто переключателем опять весь доступ открывается

NOT WORK!
I'm added different redirected domains and

A password protect feature could be a nice addition

Best extension that allows you to block sites based on keywords, but it doesn't have any whitelist mode (to allow keywords in certain website) & you can't protect your extension settings with a password (as this extension doesn't have an option to lock the extension settings).

Best addon as I wished.

The only keyword blocker that actually works!

This is working fine. It is able to block keywords and websites.