UPDATE
For some reason it is now working and I haven't changed a thing, earlier Webroot wasn't showing up as an Addon Extension or Plugin under FF, it had just disappeared. It was there on 67.0.4 Then about 10 minutes later I checked and it was under Addon but was disabled??? Strange how it wasn't there and then was! Anyway I enabled and it's working.
Best answer by Ssherjj
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