.
My Knoppix Iceweasel doesn't do flash anymore. Lots of people are seeing this problem,
not just me. See for example:
http://thevarguy.com/open-source-app...od-open-source
Don't miss the comments, they cover a wide range of opinions.

Working with another Debian-derived LiveUSB system I found that the reference
is correct, in that if you call up chromium and chromium-pepper-flash and install these,
you can get your flash back.

My 7.4.2 version of Knoppix has chromium, but doesn't have the chromium-pepper-flash*
package to download & install, so I can't update my Knoppix to recover flash-ability;
apt-get update & apt-get install doesn't find the package either.
*Not to be confused with non-free anything.

I hope someone here knows how to work the repos to get the 'pepper' flash package
for chromium and can help us out.