Usually great, but it depends on the day. Maybe it's the servers or something else entirely, but when it happens it just shits the bed. Otherwise perfect! It even has split tunneling!

some connections like bank are not working with VPN connection

The VPN Works fine. However there is a significant drop in net speed and latency.

From time to time the addon is logged off from my account and as the addon is always connected to a vpn server I am unable to open any websites.
The addon will keep trying to connect to a vpn server and fail because is no longer authenticated.
When it logs off the addon window change and it only shows the login button, without the option to disconnect. The only way to fix is to remove the addon and install it back.

A little slow navigation

Good experiences with NORD VPN, I recommend for everyone who uses Firefox and Duckduckgo.

it was very helpful to have a brower plugin and i didn't knew it existed. Download was around 1M/s, suitable for my tasks. Not as fast as with the App, but ok. i'm using NordVPN on Desktop and Mobile since 3 years and never regret. Thanks to the team

It works as expected, it works on Windows better

NordVPN extension has problem with DoH (DNS over HTTPS) - it still sends DNS request using system's DNS (windows).

To replicate set these variables:
network.trr.uri https://1.1.1.1/dns-query
network.trr.bootstrapAddress 1.1.1.1
network.trr.mode 3

The first DNS requests (about VPN sites list) were send is via DoH, but when You click "Connect" - the DNS request for specific site (pl169.nordvpn.com for example) were send straight to system's DNS (in Windows), where I catch in the logs.

Please fix it

PS: But the NordVPN chrome extension works correctly with DoH (it doesn't leaks DNS requests to local DNS)

works well and easy to use!!