There is an updated pull request by Duncaen against master on the void-packages repository

https://github.com/Duncaen/void-packages firefox-99
https://github.com/void-linux/void-packages/pull/36535

Firefox 99
[ci skip]

* [x] x86_64-glibc
* [ ] x86_64-musl
* [ ] i686-glibc
* [ ] aarch64-musl
* [ ] armv7l-musl

A patch file from https://github.com/void-linux/void-packages/pull/36535.patch is attached