FYI Android Firefox, since version 68, only allows installation of addons that are on a certain whitelist. For custom extensions, they require you to register on addons.mozilla.org, even if you just want to install an extension you wrote yourself.
Also, better than any other browser on Android.
Chrome allows no addons.
Samsung internet and Edge only has Adblock Plus.
Brave, Opera and Vivaldi has its own built-in adblockers.
There is Kiwi browser and Bromite but those where way behind on Chromium versions last I checked.
On android and IOS I would use Brave and/or Firefox.