On my @debian 10 system with encrypted LVM, /boot is running out of room. It only has 250 MB, and I had whatever kernels Debian installed and then a Liquorix kernel. I got rid of all the Liquorix kernels and then the older Debian kernels.
Today's update on my @debian Stable system took care of multiple security issues in @firefox-esr https://www.debian.org/security/2019/dsa-4516