In addition to what the others said... - Safer web browser integration (uses WebExtension Native Messaging, rather than a localhost service) - Built-in YubiKe

In addition to what the others said... - Safer web browser integration (uses WebExtension Native Messaging, rather than a localhost service) - Built-in YubiKey integration - "Health check" dashboard that shows you problematic passwords (expired, weak, reused, Have I Been Pwned integration)