# When some firefox plugins (eg. Flash) use OSS, it takes complete control of the sound device, and does not cooperate with ALSA
# The solution is to use an ALSA wrapper for OSS as the DSP device in firefox

# Install ALSA-OSS
sudo apt-get install alsa-oss

# make the following change to /etc/firefox/firefoxrc
sed -e s/FIREFOX_DSP=.*$/FIREFOX_DSP="aoss"/ /etc/firefox/firefoxrc