I am using the pre-installed version of Mozilla Firefox for Linux, some of you I know are not. This fix defiantly works on the pre-installed version, it is a little flaky on a manual install of Firefox and has been known not to work.

Please do try it if you have the manual install and hopefully it will work for you.

Open a new terminal window and type the following command:

sudo aptitude install alsa-oss

Once completed, enter the following command:

sudo gedit /etc/firefox/firefoxrc

Find and replace:

FIREFOX_DSP=”none”

With:

FIREFOX_DSP=”aoss”

Close and restart Firefox. In some cases a full reboot is required.