To be clear: it is a willful choice by Mozilla to fully protect Android users but to leave iOS users in the turmoil of a constant stream of invasive and malicious ads. I specifically took my parents off of Firefox for this express reason. Brave has a built-in adblocker, as do many other iOS browsers.
And it is not like Mozilla isn’t aware, I believe there are 2-3 open issues on Bugzilla, years old, that have just been left to wither.