if you're keeping the User-Agent pretending your browser is Chrome, at least provide all the security features that Google Chrome has, or change the User-Agent to stop pretending it's Chrome. Google Chrome can use U2F.. SafeZone can't.
SafeZone is not recognizing my Yubikey U2F keys and is not working AT ALL for 2-factor authentication where U2F hardware security keys are configured.
Yubico test site here:
https://demo.yubico.com/u2fTrying to access the U2F token, SafeZone is just sitting there, pretending to wait for the usb key, but is not doing ANYTHING about it, even if it's already connected.