[jeroenhd]

about:config is only available in Beta or Nightly on Android now, though forks like Fennec also have it enabled by default.

They took it away in Stable because changing some settings may disconnect GeckoView from the application containing it and they can't have that.

I run Beta for this reason. Nightly is too unstable for me so I had to give up custom addon lists to bypass Mozilla's outdated whitelist (they were only available in nightly for a while, I believe that's in Beta now).

Mozilla doesn't trust you to use their precious software right and they'll take away your toys if it considers you to be playing with them wrong. I still like Mozilla over Google, Microsoft, and Apple, but it's really hard to be a fan of Firefox when they pull shit like this.