I had this same problem occur. In my case, it was due to the flash player
trying to play sounds and being unable to. I modified
/etc/mozilla-firefox/mozilla-firefoxrc and changed FIREFOX_DSP from "auto" to
"none". Since doing this, everything seems to work great. I did not verify if
this happened in other plugins that use sound or not.
I had this same problem occur. In my case, it was due to the flash player firefox/ mozilla- firefoxrc and changed FIREFOX_DSP from "auto" to
trying to play sounds and being unable to. I modified
/etc/mozilla-
"none". Since doing this, everything seems to work great. I did not verify if
this happened in other plugins that use sound or not.