There is a new pull request by jnbr against master on the void-packages repository

https://github.com/jnbr/void-packages firefox-80
https://github.com/void-linux/void-packages/pull/24492

Firefox 80
Build passes for all our official supported targets.
Tested on x86_64-musl with pulseaudio.

@pullmoll are you ok with the nasm revert?

A patch file from https://github.com/void-linux/void-packages/pull/24492.patch is attached