Spotify will happily unlink your Spotify account from Facebook and has gotten a lot better (and faster) about it in recent days. Several posts on /r/spotify have experience:

https://www.reddit.com/r/spotify/search?q=facebook&restrict_...

Believe me I tried, it doesn't work in my specific case because the account was initialised via Facebook. They gotta make a new account and copy over my old data. That works, and the Spotify helpdesk is excellent.

Problem is, I use Premium via a voucher from my ISP. My ISP no longer gives these vouchers, and its claimed. So for a new account, I cannot get Premium for "free".

I should feel lucky my ISP hasn't disabled the existing vouchers (the main branch of the ISP did).

I deleted all of my Facebook data about a year ago and I actually had to create a new Spotify account to disconnect it from Facebook. Glad to hear they are improving this process.

Try this Chrome extension, Social Book Post Manager. Appears to do exactly that.

Thank you very much, that's exactly what I was looking for (though I'm trying to use Mozilla Firefox). Works very well for this purpose but you gotta recheck and verify.