Not sure what your issue is. You can install uBlock Origin on Firefox for Android and have been able to do so for years. Is there something about the Brave ad blocker that is better? I assume, for sites that make money on advertisements?
Noscript stuff is good, I assume some of the tracking protection helps but doesn't go far enough. I often found Noscript broke more sites than good it did me, but I'm glad it exists as an option.
Now, if Mozilla had the sack to include uBlock Origin with the iOS version, that would be something. But, on my Android phone, Firefox is just as good at blocking ads, so far as I can tell, as it is on my Macs. It's just the iOS version that is derpy and lagging behind — so I use Safari and Wipr2 (paid, $4.99, but solo developer who is active on the Fediverse).