I use the personal blocklist extension (https://chrome.google.com/webstore/detail/personal-blocklist-by-goo/nolijncfnkgaikbjbdaogikpmpbdcdef https://chrome.goog

I use the personal blocklist extension (https://chrome.google.com/webstore/detail/personal-blocklist-by-goo/nolijncfnkgaikbjbdaogikpmpbdcdef https://chrome.google.com/webstore/detail/personal-blocklist...) just to block w3schools.