This morning many of us saw an extensions disabled warning in Firefox. Seems to be a temporary situation.
Solution: https://discourse.mozilla.org/t/certificate-issue-causing-add-ons-to-be-disabled-or-fail-to-install/39047/14
Firefox Extensions Disabled

Mine are up and running again. Thanks for the fix link, Eric.
You’re welcome!
Thanks Eric. Applied the fix and all good. Always a delight to visit this site. Keep up the great work.