Read the live-build documentation about installing packages, specifically
look for package lists.
1) For Firefox read this https://mozilla.debian.net/ because you need to
add either backports (for a stable version) or a testing/unstable version
of Debian to your sources.list and the auto config fi
I have asked in the mailing list since by "Customizing" most people
mean changing the settings to one one's preferences
I want to actually change a version of Debian Live itself and
recreate a new ISO image using as baseline the sources from which the
"Hybrid" ISO image files are built (say, deb