uninstall and reinstall FIREFOX

Start '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in Safe Mode]''' {web Link} by holding down the '''<Shift><br> ''(Mac=Options)'' ''' key, and then starting Firefox. Is the problem still there?

A padlock with an exclamation mark shouldn't cause a website to malfunction as it only indicates that mixed content is present. You can see a special padlock at the left end of the location/address bar. *a padlock with a strike through means that mixed active content is blocked. *a padlock with an exclamation mark attached means that mixed passive content (e.g. images) is present, but not blocked. The shield icon, previously used for mixed active content, is now used for Tracking Protection. *https://support.mozilla.org/kb/mixed-content-blocking-firefox *https://support.mozilla.org/kb/control-center-site-privacy-and-security-firefox *https://developer.mozilla.org/Security/MixedContent ---- You can check in the Web Console (3-bar Menu button or Tools > Web Developer) what content this is about. *https://developer.mozilla.org/Tools/Web_Console