I'm using minimal Antergos linux with i3wm, with all packages being up to date and the laptop rebooted. Using Firefox as a browser, I'm experiencing DNS leaks when visiting websites such as ipleaks.net, https://www.dnsleaktest.com or https://browserleaks.com/ip.
The VPN is set up with the nm-applet using an ovpn file provided by my VPN provider. I'm have used the same ovpn files on a KDE bells-and-whistle distro, and have not experienced any DNS leaks.
/etc/resolve.conf when connected to the VPN:
I have disabled WebRTC in Firefox by toggling
media.peerconnection.enabled to false.
How can I find out what the cause of my DNS leak is and how can I go about fixing it?