Now I have to figure out how to fix HTML5 audio. For some reason it always uses the wrong alsa sound device, even though Flash and all my other apps use the right one. This is how I fixed it for all the other media:

  ~$ cat .asoundrc
 pcm.!default {
     type hw
     card 1
 }
 ctl.!default {
     type hw           
     card 1
 }

Also, I just checked the site and it's still using Flash for me in Firefox 35.0 (???) edit Ah, they do it for Beta versions of Firefox.