Firefox is a big hurdle on ARM though. I want up-to-date stable versions of it. I've been watching the state of Firefox AARCH64 Linux binaries published by Mozilla since it was announced for nightly builds, with interest to adding PiCore support to the firefox_getLatest script/extension when it applies to the release builds. But they're still only doing Linux AARCH64 builds for nightly...
The piCore64-15.x repo has firefox-128.2.0esr
The piCore-15.x repo has firefox-68.5.0esr - I tried building 128.2.0esr, but the build fails
The CorePure64-15.x repo has firefox-128.2.0esr
The Core-15.x repo doesn't have a firefox extension because the 128..2.0 build fails
It looks like recent versions of firefox have a problem building natively on 32-bit machines - I read somewhere that it might be possible to build 32-bit versions by cross-compiling on a 64-bit machine.