Just done today's big RHEL 7 update. If you run nvidia driver and use dkms, you will likely need to reinstall the nvidia driver. dkms said all OK, black gdm screen said otherwise. 🙃 Reinstall of nvidia driver on new kernel and all good again! 😎
Seems @RedHatNews and their product RHEL 7 are not keeping up with firefox esr releases. Two versions (critical security and crash report phone home without opt-in) away from current that was released late December 2017. 🙄