Show the issue and provide links. Login.gov works for me. see screenshot Did you try with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#search

Did you clear your browser cache? https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox

I found an answer somewhere that recommended turning off Enhanced Tracking for both Login.gov and SSA.gov. It worked for me! I finally was able to log into Login.gov and SSA.gov.

To turn off the Enhanced Tracking, click on the shield on the left side of the address bar. A pop up window will show a switch where you can turn off the Enhanced Tracking. Here are two screenshots for what you're looking for: