I have an iPhone, and I have recently been using Brave. Firefox is a favorite.
I’m trying Arc browser right now, quite cool with support for firefox and chrome extensions, but the extensions all broke after a week. Crummy experience. Brave is the best AFAIK.
I’ve been using Orion. A bit buggy but it offers proper extension support, including ublock origin (it supports Firefox and chrome extensions)
Does it matter on an iPhone? Unless something changed, Apple only allows reskins of Safari.
Honestly none. My favorite android browser would be kiwi but it’s not exactly actively maintained which feels very insecure. I’m currently using firefox but it’s nothing like its desktop equivalent.
I use Mull. Unsure if it’s on iPhone though.