Hi there! It sounds like there might be a compatibility issue between your Firefox and WordPress. Let's try a couple of things to get you back in. First, make sure your Firefox is up to date. Sometimes a simple update can fix such glitches. If that doesn't work, you can try clearing your browser's cache and cookies. This often helps in resolving login issues. If the problem persists, check if you have any extensions or add-ons that might be causing conflicts. You can disable them one by one to see if that makes a difference. Lastly, ensure that your security settings aren't blocking WordPress unintentionally. Give these steps a shot, and hopefully, you'll be back to accessing your account smoothly.

What does the screen say though?

The AdBlocker Ultimate extension is causing issues for many users recently. You can:

• Disable it.
• Uninstall it from about:addons, refresh the page to clear settings then re-install.
• Use an alternative like uBlock Origin.