Except you’ve actually changed nothing. Apple forces all third party browsers on their devices to use WebKit (the Safari engine) for the backend, so really all changing browsers does is give you a reskin under Apple’s thumb.
Actually, I have. It gives me better tracking protection than vanilla Safari, it allows me to use SearXNG, and it means I can set a custom homepage. Also, for some reason, Safari has no private mode on my phone.
Not to mention that Mozilla is working on a Gecko-based version of the browser, as Apple is being forced by the EU to allow sideloading, third-party app stores, and third-party browser engines.
Safari has pretty decent tracking protection built in actually.
I love FireFox and I love my iPhone, but the iOS FireFox app is objectively terrible. I realize that fact is completely Apple’s fault though.
[meme where the hero pulls the mask off the tied-up Firefox’s head, revealing Safari]
I recommend mull over firfox for mobile. Has many of the patches from torproject and arkenfox user.js, and it is released by the divestOS project. All id add to it is ublock origin.
fdroid: https://www.f-droid.org/packages/us.spotco.fennec_dos/
Edit: I see people saying OP is on ios. If so it isnt available and wouldnt do much anyways saidly. Keeling this comment for others who use android.