>You cannot uninstall slow crap Safari from an iPhone.
Which is irrelevant. You can always not use it. And when you don't use it, it doesn't slow down your iPhone.
In fact it doesn't slow down your iPhone even when you use it.
In Safari's backend is close up there with Chrome for speed and beats Firefox (as seen in macOS, where all three engines are available). It also does so with much less memory and cpu load, to the point that it adds 20% or more of battery life to use it on a laptop.
Which is irrelevant. You can always not use it. And when you don't use it, it doesn't slow down your iPhone.
In fact it doesn't slow down your iPhone even when you use it.
In Safari's backend is close up there with Chrome for speed and beats Firefox (as seen in macOS, where all three engines are available). It also does so with much less memory and cpu load, to the point that it adds 20% or more of battery life to use it on a laptop.