Is there an extension for Google Chrome to block access to sites by time?

Question

Google Chrome

Is there an extension for Google Chrome to block access to sites with the following features:
1 Ability to set your own list of blocked sites;
2 Ability to set a specific interval for accessing the site (for example, for vk.com from 8-00 to 12-00 and from 13-00 to 17-00, for i.ua from 12-00 to 20-00);
3 Ability to set a password for the whole thing.

Answer 1

lifehacker.ru/2012/12/05/rabotajj-produktivno-5-ra...