As a Windows user, I would love to have this as an extension on Microsoft Edge.
Great news, it’s already a thing! Opal for Chrome will work on Edge - Just go here and make sure that you allow extensions from the Chrome Web Store :) https://chrome.google.com/webstore/detail/opal-focus-save-time/lmhpbdikmpeolddmaemjgbhbpngeeopj