The comments on the bug are exemplary of the kind of crap we deal with when supporting Linux users, and really go a long way towards making people not want to s

The comments on the bug are exemplary of the kind of crap we deal with when supporting Linux users, and really go a long way towards making people not want to spend any time on these issues. If you actually read the details you'd note that the code to support ALSA wasn't removed, it was simply put behind a configure option (--enable-alsa). Most of the people complaining in the bug are running builds from a distro that provides Firefox builds, doesn't ship PulseAudio, but didn't bother building Firefox with that option. Their distro shipped them a broken build so of course they come to complain in Bugzilla.