I had same problem. All okay now with latest firefox.
There is/was a certificate bug in Firefox - unsupported add-ons, it has been fixed in latest download of firefox info: blog.mozilla.org/addons/2019/05/04/update ClickHere
Apple and Google pull Fortnite from app stores, Epic Games sues Apple
Best art and design exhibitions still happening in 2020
Should I buy the new iMac?
Les bons plans sport et bien-être (2020)