Ymir wrote:
This happens because of the Flash plugin. The only ways around is that I'm aware of are using a sound daemon, getting a second soundcard (that's what I did), rewriting the flash plugin, or, not going to sites that use flash. Of course, you could also figure out how to trick Mozilla into thinking you've got a flash plugin so it won't ask you to download it, but not really having it installed, though, this is only an ugly hack.
deleting libnullplugin.so from Mozilla's plugin folder should stop mozilla from ever asking you to download any plugin.