I have Firefox 66.0.3 on Ubuntu 18.04, Ubuntu 16.04 and windows 10. Since last night, all Firefox add-ons on the Ubuntu 18.04 machine stopped working and cannot be reinstalled (connection error). Add-ons are fine on other platforms. Just minutes ago when I started to write this review, everything got back to normal.

Seit letztem Firefox-Update wurden leider sämtliche Addons unbrauchbar.Hoffentlich bekommen die Addons bald ein Update

ну вроде починилось в новой версии FF

yes

Nice