Qubes OS is a security-oriented project which focuses on isolating the system components and data. The project has released Qubes OS 4.2.0-rc2 which introduces several key changes. The release announcement lists the highlights: "Dom0 upgraded to Fedora 37. Xen updated to version 4.17. Default Debian template upgraded to Debian 12. Default Fedora and Debian templates use Xfce instead of GNOME. SELinux support in Fedora templates. Several GUI applications rewritten, including: Applications Menu; Qubes Global Settings; Create New Qube; Qubes Update. Unified grub.cfg location for both UEFI and legacy boot. PipeWire support. fwupd integration for firmware updates. Optional automatic clipboard clearing. Official packages built using Qubes Builder v2. Split GPG and Split SSH management in Qubes Global Settings.