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

https://github.com/jnbr/void-packages firefox83
https://github.com/void-linux/void-packages/pull/26490

firefox: update to 83.0.
Builds pass on all our official supported architectures.
Briefly tested on x86_64-musl.

[ci skip]

A patch file from https://github.com/void-linux/void-packages/pull/26490.patch is attached