I use mobile firefox exclusively because I can run an ad blocker.

Otherwise I'd be stuck in apps that have at least some vested interest in keeping ads reasonable.

On iOS mobile Firefox provides the same blocking capabilities to Safari as is available in Firefox.

That's because iOS is all just reskinned Safari. Blame Apple, not anyone else

If you have Android I recommend Blockada. You won't see ads in any app https://blokada.org/

I still use Firefox with uBO and enjoy being able to hide all those annoying headers, footers and overlays.

I've been using uBlock Origin on Firefox on my Android phone for years.

The content blocker APIs started on Safari on their mobile devices.

In the comments of this article the author explains that that kind of blocking still works on the new Safari.

Sadly, despite the downvoting and "I am! And so is my wife!" replies, you're essentially statistically correct. The number of "firefox for android" users (and I'm one of them) is just a yawn and an ironic smile between Google execs in any "shall we allow plugins on Chrome for Android to compete with Firefox" discussion if indeed it ever even gets mentioned.