Re: Palemoon, check. Seamonkey, check.
> Configuring pulse audio to work with these firefox instances running under sudo wasn't easy
huh! I use a sudo based scheme to setup different firefox instances (one for every site I need a login for, and one for others; currently have 11 such userids)
only one of them needs sound, and it was a simple matter of adding that user to the group "audio"; never had to mess with PA networking