On Android I use the insecure and questionable approach of Kiwi browser, which will run desktop chrome plugins including Ublock. Interested to hear if anyone has a better solution.
A lot of people left firefox on android, when they removed their prior version/codebase a few years back, and introduced an alpha quality product with no extensions, endless crashes, and bugs galore.
It took them a year or so to even add back in extension support. and so many things lacked for a long time.
I don't feel like using a product that is so horribly planned, amd executed. Sheer incompetence.
raises hand I'm in this group. I finally gave up on mobile Firefox a few years back despite being a user and advocate for many years prior to that. The leadership and product decisions at Mozilla are indescribably bad and have done a huge amount of damage to formerly great product. Desktop Firefox still works ok, although it also suffers from too many bad product decisions.
For mobile I use Vivaldi which is not bad. The adblocker isn't as good as uBlock Origin but is mostly good enough, and the builtin dark mode works really well.