Unable to sign in via Firefox 59.0.3

I cannot sign in via Firefox, and have unsuccessfully tried turning off add-ons and private mode. I’ve also added NewsBlur to the permission list for popups and cookies. In addition, when I try to reset my password, NewsBlur says my account does not exist.

I have no problems in Chrome or with the Android app. Can anyone advise?

Are you hitting https? Try https://www.newsblur.com. It might be because Firefox is blocking http-only password entry.