I don't think this has been asked before. At least, I could find nothing. BrightCloud, owned by Webroot, offers an extension for Chromium/Chrome. I was wondering if Prevx/Prevx SafeOnline makes use of BrightCloud's data to prevent access to malicious domains, or does Prevx only rely on the findings done in their own lab? Because, if it does, then it would be useless to install the extension to relatives as Prevx would already protecting against the same domains.