Chrome add-on warns netizens when they use a leaked password. Sometimes, they even bother to change it

Alerted to exposed credentials, users do something about it roughly a quarter of the time

Between February and March this year, after Google released a Chrome extension called Password Checkup to check whether people's username and password combinations had been stolen and leaked from website databases, computer scientists at the biz and Stanford University gathered anonymous telemetry from 670,000 people who installed the add-on."