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

https://github.com/subnut/void-packages mozjs91-91.5.0
https://github.com/void-linux/void-packages/pull/36241

[DRAFT] [Help needed] New package: mozjs91-91.5.0
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DRAFT

A patch file from https://github.com/void-linux/void-packages/pull/36241.patch is attached