That would be either site issue or problem or Security software blocks or adblocker causing the invalid login.

Would that be something in Firefox I can change?

Problem here is trying to diagnosis a login site is problematic at best since one has to have a account to be able to see if there is or there isn't a problem when a user logs in. Did they reply back from NY time if there was firefox issue logins?

Hi DavidOstiller, are you entering your email and password? What happens when you try to log in? For example:

• Nothing, the form won't even submit
• Google "CAPTCHA" challenge doesn't pop up
• Get a blank page
• Told email or password is wrong
• Something else

If you are using one of the other methods (Google or Facebook account), what happens when you try to use that?

You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• hold down the Shift key and left-click the Reload button
• press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Remove the Cookies" from websites that cause problems:

• Options/Preferences -> Privacy & Security
  Cookies and Site Data -> Manage Data

"Clear the Cache":

• Options/Preferences -> Privacy & Security
  Cookies and Site Data -> Clear Data -> Cached Web Content: Clear

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems