Yes, it is important to stay updated and your reported Firefox 80.0 is quite old (current is 89.0.2).

• https://support.mozilla.org/en-US/kb/update-firefox-latest-version

That is possibly caused by your "Avira Antivirus" security software.

You can check the about:policies page (63+) to see whether policies are active and whether errors are reported.

• https://support.mozilla.org/en-US/kb/see-active-policies-firefox-enterprise

I have left a response on the Mozilla site. Thank you for your time and effort

Policy Name Policy Value DisableAppUpdate true

Refered to line number 5046 where updates are disabled by sys admin. Appears its attached to "extension updates" and then my system is hijacked be a "system administrator" and disables updates.

Can I uninstall Foxfire and reinstall an updated version?

Reinstalling won't help you. You have to remove this policy or disable this function in the program that made it.

You can inspect the Mozilla and Firefox keys with the Windows Registry Editor in HKEY_LOCAL_MACHINE and in HKEY_CURRENT_USER with the Windows Registry Editor to see whether GPO policy rules are active.

• HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\
• HKEY_CURRENT_USER\SOFTWARE\Policies\Mozilla\Firefox\

Note that the mere presence of the "Mozilla\Firefox\" key is sufficient to make Firefox display this notification, so if you have the Firefox key then remove it and only leave the Mozilla key or remove this key as well if it is empty.

• HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\ =>
  HKEY_LOCAL_MACHINE\SOFTWARE\Policies\