How To Fix Firefox When It Stops Playing Sound In Ubuntu

I was having problems with Firefox in Ubuntu where sound would stop playing (Flash videos in particular) if I had the browser open for 10+ hours.  To fix the issue try the following:

• Open terminal
• sudo aptitude install alsa-oss
• sudo gedit /etc/firefox/firefoxrc
• Type (or copy/paste) FIREFOX_DSP=”aoss”
  • Save and restart Firefox