Thanks to both Klaus K and philo.

I'm pleased that Klaus K has taken the time to inform us about his rationale
in Knoppix 8.1 to work around a new feature of Firefoxes 55 and beyond which
would interfere with Adriane and other client users of ALSA in Knoppix.

philo's work-around may not suffice to meet Klaus K's design requirements,
but for my own undemanding needs of a Knoppix browser with sound, Chromium
is a clumsy alternative inconvenience to Firefox 55. To my knowledge, there
are no uses of ALSA other than Adriane that I might likely employ.

I plan to continue using the philo work-around while I try to understand the
new LiveUSB remastering feature.