In case your FF addons are suddenly disabled, you have to wait until they fix it. Cert expired.
For the geeks here wanting to tweak: https://www.ghacks.net/2019/05/04/your- ... ats-a-bug/
/update: yes they are working on it: https://discourse.mozilla.org/t/certifi ... tall/39047
You might get a '429 Too Many Requests' on this website.
