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

https://github.com/mmnmnnmnmm/void-packages thunderbird
https://github.com/void-linux/void-packages/pull/23380

thunderbird: update to 68.10.0
Tested on x86_64-glibc, built on armv7l-musl.

A patch file from https://github.com/void-linux/void-packages/pull/23380.patch is attached