Everyone is welcome to edit the wiki, please help yourselves
XSPF urls can be handled by playlick or playgrub, like so: http://www.playlick.com/#xspf=www.example.com/playlist.xspf
Create xspf_opener.sh in your /usr/bin:
Go to firefox preferences, applications, and change the default app for XSPF to this script.
If not set, click an XSPF in firefox and set it to remember to use xspf_opener.sh