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

https://github.com/Duncaen/void-packages firefox-97
https://github.com/void-linux/void-packages/pull/35509

firefox: update to 97.0.
[ci skip]

* [x] x86_64-glibc (tested)
* [x] x86_64-musl (tested)
* [x] armv7l-musl

A patch file from https://github.com/void-linux/void-packages/pull/35509.patch is attached