Today I noticed that the Kaspersky protection add-on was disabled in FireFox. As I could not get it to work again I did a re-install of Kaspersky total security. That produced some problems with scanning secure traffic, but I managed to get that working again. The Kaspersky protection add-on is still disabled. Firefox put it in the "Unsupported" section.
I have the latest version of the add-on: 20.0.543.1053,d
I also have the latest FireFox: 66.0.3
What can I do to get the Kaspersky protection add-on working (again) in FireFox?