Following link will take you to the Google chrome’s Remind ME extension.
https://chrome.google.com/webstore/detail/dkbeopafgiefnlffkhmkhldcojehlgam
I am used to browsing indefinitely by following links from one site to the other and so on. Now with Remind me installed, I am able to control browsing time.
This is helping to
1. Manage time better and
2. to relax my eyes with reminders set for every 20-30 minutes.
This extension is worth trying 🙂