Spotify Web Player Open Ports Firewall

[JoelJoelJoel42]

Hi,

I'm the admin in this situation, I'm trying to set up our firewall/content filter to allow spotify so that users can access the web player (most users are on chromebooks). I've set it to allow .spotify.com and from the devices that are not working the only block activity is for facebook.com. Am I missing something, is there a specific content server that I need to also unblock for the web player to work?

For reference, desktop app works fine from windows and mac machines.

Attached is the block activity for the device attempting to access the web player.