[SushiHippie]

FWIW about:config is available in beta and nightly on android, my main browser was nightly for a while but it sometimes was too unstable, so I switched to beta as my daily, which seems to be stable.

[_Algernon_]

It is also available on stable though you have to enter the more verbose `chrome://geckoview/content/config.xhtml` to get there.