WasteNoTime is a browser extension which is designed to help you manage the time you spent on the Internet.
Time Tracker feature gives you reports on what web sites you spent most of your time, for the past day, week, or month.
Instant Lockdown feature allows you to focus on your work for a period of time with limited Internet access.
You may set up Block List to automatic block selected web sites as soon as you have spent predetermined amount of time on them each day.
Blocking settings are highly customizable to suit your particular needs. You may override some blocked sites with Allow List. You may even customize the time quota for a particular web site or web page.
Time Range feature lets you define what are your work hours and configure different time quota for work hours and outside of work hours.
This extension is also available for Safari browser on Mac. The settings can be exported and shared across multiple browsers or multiple computers.