Web Player does not play music in Firefox 64-bit

[odabaxok]

Web Player does not play any music in Firefox 64-bit since the new update when autoplay is disabled (see last edit).

EDIT 2017-06-01: For a week, it seemed this was partially fixed. It played music, but pausing broke the player and it had to be reloaded. Now, it doesn't work again.

EDIT 2017-07-26: Still not working.

EDIT 2017-12-14: The solution for me was enabling autoplay in Firefox (go to about:config > set media.autoplay.enabled to true). So, I have edited the original problem with this information.

[Sebasty]

Same here, except it works on another computer with same settings.

Spotify is aware of this error and is working on it.
I tried all kinds of things such as restarting the router, using webplayer on incognito mode in both Firefox and Chrome, adding flash exceptions for the player on Chrome, ...

The easiest solution is installing an user-agent switcher and using the IE user-agent, or using IE itself for the webplayer.

I guess it's some simple little setting, but I have yet to find it... with the UA spoofer I am currently not too bothered. : )