Screentime

To keep track and manage your time on sites that reduce productivity. You can set the number of minutes you want and time frames

The extension allows you to control how much time you spend on popular social media sites and entertainment sites. You can specify how many minutes in a day you want to use on each site and once you've gotten to the limit, you won't be able to access the site. Time frames can be specified for when you want the sites to be inaccessible for each day of the week. You can also add or remove sites.