That's a lot of add-ons. Have you tried the same steps in Safe Mode? I have a Walmart account. Can you provide the steps to replicate the issue?

Just try to check out.... perhaps contact Walmart Tech and ask them to tell you the tech specifics as they claim to have been trying to fix it for 6 months now. They keep telling me to get rid of FireFox

Make sure you are not blocking content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/

https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection

Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-firefox-did-not-connect

https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors

What do the security warning codes mean

Hi Don, at what point does the site request a PIN -- is this during login with two-factor authentication (code sent to your phone, for example)? It would be helpful if you could give the steps to reproduce the problem in a little more detail.

Also, unless Firefox is confused, it is enforcing a rule set by the server of the framed page that the page should not be displayed in a frame. To see what that page is, you can right-click that error message, expand the This Frame menu, and click Open Frame in New Tab.

Did you try it in Safe Mode like we asked? It works for me. see screenshot