The FireFox plugin doesn't allow you to use it if you do not allow their data collection. I tried to log in multiple times (rebooted computer, disabled and enabled plugin, reinstalled plugin). But every time the plugin refused to log me in and just showed the login button. It did always ask me to allow data collection and if not allowed, it simply does not let you use it. The VERY first time that I tried and allow data collection, surprise surprise... it just works. NOT cool NordVPN. I'll let my next months pass and not renew my subscription. Time to make the move to Mullvad after that.