Hello fellow Guix, I'm pleased to announce that IceCat-68.2.0-guix0-preview1 is now on the 'master' branch, and that substitutes for x86_64-linux are available from ci.guix.gnu.org.
This update includes fixes for CVE-2019-11757, CVE-2019-11759, CVE-2019-11760, CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764, and CVE-2019-15903. Note that IceCat 68 has not yet been released by the IceCat project. This is a work-in-progress, and may not currently meet the privacy-respecting standards of the IceCat project. I encourage you all to try it and report back with your experiences. Thanks, Mark