[politelemon]

Ublock origin is a Firefox extension that works on mobile. You don't need a dedicated app for blocking adverts.

[pousada]

Not on iOS, there Firefox is actually Safari under the hood and you can’t use extensions… Haven’t found a good solution yet (other than avoiding websites with ads)

[sgtaylor5]

Wipr2; paid for Safari but it works on all Apple devices with that one payment.