New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/issues/27731#issuecomment-755924072

Comment:
Well, `mkicecat` itself downloads the firefox-esr tarball and verifies the sha256sum and signature.
Then it takes a very long time to patch the sources - on our builders that would probably be hours.
Doing this for every target in the do_patch() would slow it all down by a factor of 2-3 AFAICT.