I tried Bitdefender for Mac today, and decided to try its TrafficLight extension that checks the safety of websites. As I always do, for privacy reasons, I used a proxy to intercept the traffic and see what data, if any, Bitdefender sends to work.
Unfortunately, TrafficLight sends every URL to Bitdefender for checking, which makes me uncomfortable for obvious reasons, even if Bitdefender doesn't save that data, it's still a privacy problem that such sensitive information is sent to Bitdefender.
For this reason, I propose an alternative that can really be implemented: Offline databases.
Just like virus definitions, you should implement a way that TrafficLight works offline, regularly updating the database that your servers use but for local use, inside the machine. This would not only be very beneficial for privacy-conscious users like me, but also would reduce costs for Bitdefender, as this feature wouldn't require requests for every URL all the time we browse.