You cant use chrome/chromium as it can't launch java applets
Using firefox/iceweasel
Note: the packages here are what I was missing on Debian:Sid around Dec 2014. Your mileage may varry. If you install just icedtea, you can jump to attempting to run Webex and just chase the deps from there
echo missing packages for webex
sudo dpkg --add-architecture i386
sudo apt-get install icedtea-netx icedtea-plugin
sudo apt-get install libgtk2.0-0:i386 libpangox-1.0-0:i386 libpangoft2-1.0-0:i386 libpango-1.0-0:i386 libxft2:i386 libpangoxft-1.0-0:i386 libxmu6:i386 libgtk2.0-0:i386 openjdk-6-dbg libgtk2.0-0:i386 libpangox-1.0-0:i386 libpangoft2-1.0-0:i386 libpango-1.0-0:i386 libxft2:i386 libpangoxft-1.0-0:i386 libxmu6:i386 libgtk2.0-0:i386 openjdk-7-dbg:i386 libxmu6:i386 libxt6:i386 libxv1:i386
launch webex -- expect it to fail open a shell cd to ~/.webex/<highest number|broken number>
ldd *.so | grep 'not found'
if its anything besides libjawt.so
sudo apt-get install apt-file
apt-file search *\library.so
install the :i386 version of whatever is missing