A major update just happened with desktop web apps – we have support for
Linux operating systems now on Nightly! Our awesome contributor Marco
worked hard to deliver support for installing and launching web
applications in the chromeless shell seen on other operating systems.
See his wiki here
(https://wiki.mozilla.org/SummerOfCode/2012/LinuxNativeWebApps) to see
what he has done so far for linux web apps support and what he plans to
do in the future.