It should show up. Can you check, is it a proper cert issued by Entrust, Inc. for Bank of America Corporation?

I don't think so. If it is cert issue, then Chrome would not show up, Chrome shows it up correctly instead. Secondly, I also checked other sites with different types of EV SSL certificate, all of them can't show up in Firefox.

Now, interesting thing is that everything seems okay right now. Well, not sure why the problem appeared at the time I checked them.

What does it say when you click the Control Center 'i' icon?

Are you using a userChrome.css file?

• https://www.userchrome.org/what-is-userchrome-css.html

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

In Firefox Safe mode these changes are effective:

• hardware acceleration is disabled (Options/Preferences -> General -> Performance)
  *https://support.mozilla.org/en-US/kb/performance-settings
• all extensions are disabled (about:addons)
• default theme is used (no lightweight theme)
• default toolbar layout is used
• xulstore.json is ignored
• userChrome.css and userContent.css are ignored (chrome folder in profile folder)
• JavaScript JIT compilers are disabled