Firefox Hangs

[http://www.mozilla.com/ Firefox] hangs when tab or window containing a flash applet is closed. This only happens with sometimes.

== Possible solutions ==
=== Sound problem ===
The problem can be that [http://www.mozilla.com/ firefox] is not able to play the sound since you have a newer [http://www.linux.org/ Linux] [http://www.kernel.org kernel] (with [http://www.alsa-project.org/ ALSA]).
Install ''libesd-alsa0''. On a [http://www.debian.org/ Debian] based system just do:

<bash>apt-get install libesd-alsa0</bash>