This is true, and they do. I'm replacing Comodo's Valkyrie API with Symantec's Browser Protection API for performance reasons. But, no data is logged, and only the minimum amount of data is sent to each provider.

uBlock Origin's filters aren't up-to-date. You can go to PhishTank and try all the recently added websites on a VM. uBlock won't block any of them.

Osprey is entirely asynchronous. It doesn't hold pages at all. If you visit an unsafe website, you might see it for 50-250ms before the connection is stopped.

Good to know!

I promise the warning page was made from scratch!

1) Osprey is just more protections built into one. It combines seven pre-existing safe browsing extensions you can already download into one lighter and better extension. All these extensions do is send the URL you visit to an API. That's what SmartScreen and Google SafeBrowsing do. 2) Read gorhill's comment. Checking network activity is easy, and checking every extension is always good.

Thanks gorhill. Yes, this is true! Osprey only sends its stripped-down URLs to the services you turn on. Nothing more. It's as anonymous as it can be without using a VPN, afaik.

It uses the same exact framework as Google SafeBrowsing and Microsoft SmartScreen.

The same thing happens with Google's SafeBrowsing, Microsoft's SmartScreen, Bitdefender TrafficLight, or Emsisoft Browser Protection. Osprey essentially combines multiple already existing browser protection extensions into one.

SafeBrowsing uses local database AFAIK.

Ah! True. I guess they realized it would be better to do that than have the extra network strain.