Includes fixes for CVE-2023-25751, CVE-2023-25752, CVE-2023-28162, CVE-2023-28163, CVE-2023-28164, and CVE-2023-28176. * gnu/packages/gnuzilla.scm (%icecat-base-version, %icecat-build-id): Update. (icecat-source): Update gnuzilla commit, base version, and hashes.