New issue by JamiKettunen on void-packages repository

https://github.com/void-linux/void-packages/issues/39226

Description:
As per https://endoflife.date/firefox 78 ESR has been EoL for nearly a year soon. According to a quick `grep -r` only the following consumers remain:
- `cjs`
- `0ad`
- `polkit`

This would also contribute to #38229 ([`mozjs78`](https://github.com/void-linux/void-packages/blob/master/srcpkgs/mozjs78/template#L11) has `python-devel` in `makedepends`).