We have merged a toolchain update which brings in a glibc build very close to glibc 2.34 upstream release. This build starts using clone3 for creating threads. This may require browser and container tools updates which adjust seccomp filters. clone3 kernel support is NOT required, but a proper “system call not supported” error (ENOSYS, like older kernels report without seccomp filters) or a working clone3 system call is now necessary. Thanks, Florian