Yesterday I was unable to sign into The Guardian website (https://profile.theguardian.com/signin?INTCMP=DOTCOM_NEWHEADER_SIGNIN&ABCMP=ab-sign-in&componentEventParams=componentType%3Didentityauthentication%26componentId%3Dguardian_signin_header and https://profile.theguardian.com/signin? ) The problem is that after I click "Sign In", that little circling line becomes the Energizer Bunny, circling away and circling away, but not logging me in. I have no problem logging in using those login pages on Edge, so confident of username/password combo I have (repeatedly) turned off tracking protection, Adblock Plus & Privacy Badger for the site, cleared history (cookies and cache, as well as all), followed the complete set of instructions at https://support.mozilla.org/en-US/kb/fix-login-issues-on-websites-require-passwords, and refreshed Firefox. Still the same problem. HELP - I don't want to be forced to use Edge :)