What OS? If windows, home or pro and what security software are you running besides MS Defender? What version of Firefox? '''Show the issue and provide links to replicate.''' Do you have the same issue with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf This video works for me. see screenshot https://www.udemy.com/course/suse-administer-linux-with-yast-use-help-resources/?couponCode=CP130525US