Firefox flash sound problem

The following steps are the solution on the problem of firefox flash sound problem.

# Flash also looks for /usr/lib/libesd.so.1
sudo ln -s /usr/lib/libesd.so.0 /usr/lib/libesd.so.1

# Flash expects /tmp/.esd/socket to exist.
sudo mkdir -p /tmp/.esd/
sudo touch /tmp/.esd/socket