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

https://github.com/sirikid/void-packages firefox
https://github.com/void-linux/void-packages/pull/12709

RFC: firefox alternatives: x11 and wayland 
Subj. Can't test, out of disk space.

A patch file from https://github.com/void-linux/void-packages/pull/12709.patch is attached