>>steve_+ne
The real versions of Firefox, Chrome and Edge etc have been banned. Instead Apple forces them to create new browsers which use their controlled, locked and unmodifiable WebView removing the majority of the ways that these browsers can differentiate themselves while providing features exclusive to Safari (like the ability to install Web Apps).
This ensures that none of the "browsers" can compete on iOS and this obvious by comparing browser market share of the same browser between iOS and Android.