nice catch

Se l'estensione non viene installata, Installare la versione FireFox 66.0.4 o fare l'aggiornamento a questa versione e reinstallare l'estensione.
If the extension is not installed, install the FireFox 66.0.4 version or upgrade to this version and reinstall the extension.
Buono, Good!! Intanto aspetto che NordVpn si possa vestire da firewall/router software (forse...desiderio...), ma anche un IP/Port Filter e url filter non sarebbe male. :-)

Good privacy and security

I've used NORD for years and have zero problems and some minor tests show it's secure. Does what I want. Works on Window_crap to. I use it on my Android it works.

Good

Unless I'm doing something wrong, Their one-size-fits-all linux package is not suited for all the distros I use, and when I have to configure several VPNs accordingly, the time adds up. The add-on is an elegant solution in my case

Ran NordVPN under Ubuntuox 64 with firefox and worked like a dream