Ubuntu: Chrome/Firefox CA certificate improvements

[defunctl]

Need to add some additional automation for Debian/Ubuntu systems.

Chrome uses $HOME/.pki/nssdb on Ubuntu for certificates.

Firefox uses a random string path: ~/.mozilla/firefox/${RANDOM PROFILE}.default-release

Need the certutil binary: sudo apt install libnss3-tools

For Chrome:

1. Tell the user to shut down all Chrome instances
2. certutil -d sql:$HOME/.pki/nssdb -A -t "C,," -n tribe -i /usr/local/share/ca-certificates/tribeCA.crt

For Firefox:

1. Tell the user to shut down all Firefox instances
2. Get Firefox profile directory: find ~/.mozilla/firefox -name "cert9.db" | xargs dirname
3. Something like this should work: certutil -d sql:$(find ~/.mozilla/firefox -name "cert9.db" | xargs dirname) -A -t "C,," -n tribe -i /usr/local/share/ca-certificates/tribeCA.crt