I suggest you avoid NordVPN since it has serious security issues. By default it does not block network traffic when the connection to their server is dropped which leads to leak of your traffic. It can be turned on but the issue is that it is not default. Also in default, it does not change your DNS servers, which has the similar issue as above. Thus in default settings, it is as insecure as if you were not using any VPN at all (since you cannot forsee the connection drops to their servers). Second, even if you change the settings, there is no guarantee that this will stay so, updates or you yourself can delete the configuration without realizing what you have done and then go on browsing thinking that your security is tight but it is not. Any security product that is provided with such lax default configuration is a bad product. Lastly, they could not explain the protocol difference or how to determine what protocol is used when connecting to their servers as opposed to other solutions which also provide network traffic blocking and dns by default.
To update based on the request from the developper. Your customer support effectively said that you do not care what the default settings are since users can change it, again, this is the problem in itself. And again, you claim a secure privacy oriented product, this has to reflect also in its default settings. Without kill switch on, any vpn for security and privacy purposes is almost completely useless, the same goes for DNS.

So much easier than switching the VPN on/off at a lower level and sometimes works even better than eg Network Manager under linux

Is there any new update? It keeps getting disconnected, really annoying. Please check what's wrong and make it stable and improve it. Windows desktop application is working fine for me, this proxy extension should be repaired/updated.

the extension crashes every time in private mode (ff 67.0)

Diferente do programa que funciona perfeitamente, esta extensão é um fiasco infelizmente! Por muitas vezes voce é desconectado e fica pedindo pra logar novamente. Uma pena que seja tão ruim. Vamos aguardar futuros updates deste addon mas HOJE (dia 23/05/19) não recomendo o uso. É pedir para ter dores de cabeça pois fica caindo toda hora a conexão...

The extension works well for me since the last year.

Ok, works fine with linux mint 20 and firefox

Worst coded extension ever. Sometimes the GUI thinks you're disconnected despite you're connected, so you need to relog each time you use your browser. Same problem on the extension from the same company for other browsers.
Sometimes says you're connected to a VPN server despite you're not : big security issue.

this is the best vpn

This addon does not remember the authorization. After restarting Firefox I enter the login and password again.

I'm running Linux and this add-on greatly simplifies my connection process for secure browsing.

Edit: Connection issues are difficult to resolve using this add-on. Feels like Nordvpn traffic is very slow like they are overloaded at times. Still works ok now and then

Works but too basic. Needs further improvement i.e. remebering previous connections.

nice catch