3 ms·They are no longer required to use Safari's engine in the background?by vaccinator 6y agoThey are no longer required to use Safari's engine in the background?evad3r 6y agoIt's still Safari's engine but the web browser can built their own functionality on top of it, like content blocking, tab sync etc.saagarjha 6y agoContent blocking functionality is not exposed to third-party browsers.