This extension blocks websites you don't want to visit, as well as providing a to-do list.
Stay On Task when you browse the Internet. Block any website of your choosing, as well as create a To-do List with time limits. Open a new tab, and click on the browser action on the top right of the tab to toggle the menu.
- (2018-05-30) what year is it: It wont open or work!
- (2016-12-16) jc balcita: I need this in my life! Blocks all my favorite websites when I need to be productive.