I can't login to Facebook anymore with Firefox, but can with all other browsers

Hello I can login to all other sites on Firefox, except Facebook. I only had one extension, UBlock Origin. I tried disabling this, then uninstalling, but I still couldn't login. I deleted Firefox's cache several times. It's been like this for a few days now. No one else online seems to have this problem. At the moment I'm using any other browser to login to Facebook. I don't know what else to do, as I prefer just using the one browser, Firefox. Please advise if you know of a possible fix.