If you're technologically illiterate, this might be true. Witness however Firefox for Android (vs iOS), the most important differences for me being:

- Extensions support, so uBlock Origin, Privacy Badger, the best ad-blocking combination that far surpasses Safari's content blockers, which are pretty shitty; and extensions are useful for more than ad-blocking — e.g. I have another one on my tablet that turns all web pages to dark mode, whether they support it or not

- Web push notifications

- (Up until very recently) webp format support

On Android I wouldn't even install many apps, like Facebook, or Twitter, or Fastmail, I'd simply use them as PWAs (web apps), in Firefox with ads blocking on, because I could.

I still use Firefox on iOS for the history / bookmarks syncing, but it's a shadow of actual Firefox.

> As much as you and I may care about that, for many (most?) people the browser chrome is the most important part.

Except that for many/most people it's equally important to have a market choice which drives product improvements by competition. Not being able to choose a fully opensource browser engine (not even Firefox!) on iOS is a severe blow to opensource as a whole and browser engine competition in general. It's way worse than it ever was in times of IE6 - you never needed Microsoft's private signing keys to switch to Firefox or Chrome.