it works but it is slow. it is best just turn on VPN with NordVPN for Windows 10. It is WAY faster. NordVPN connection through Firefox add-on for whatever reason is really slow.

This is an addon for paying users, yet it now forces me to solve a captcha at every login after a browser restart.
NordVPN markets itself as privacy respecting company, but insults the intelligence of customers by utilizing a for-profit captcha with hcaptcha, a company which accepts bids for the captchas solved by users to label training data for companies, potentially a very real threat to privacy through finer grained surveillance.

Keeping an extension logged in securely is not a difficult task and nobody else so far needed a captcha to keep users logged in consistently, so why not be honest with paying customers for once?

This is great when it works, it's supposedly the best VPN, but it really slows my internet when switched on half the time, and when using the app it will disconnect after about 10 minutes. Watching a movie on Netflix with the app is impossible. It's not a free VPN so we expect better! It would nice to not have connectivity issues and to not affect browsing speed.

What is with the slowly growing window when you click on the extension button? Just open the whole thing immediately. I have to click it, watch it start to grow at a painfully slow pace, scroll down in the tiny window, and then try to click "quick connect" on a moving target. I cannot think of a worse UI design.

Quite unstable and broken. Bug #1: after connecting and disconnecting, the country list just freezes. Bug #2: after some time, just stops working. TLS handshakes take an insane amount of time. The desktop application works better than this plug-in.

Sometimes work correctly but from time to time I need to reinstall in order to work smoothly

It keeps logging me out when I'm not using it

Works well, except for one thing, on linux mint .local addresses are unreachable.