Support OpenVPN and/or Wireguard

So that one can just use config file and connect to vpn of choice.

This is a bit specific. I think that an app, such as OpenVPN Connect, or the Wireguard app would work better, be more stable, and have more features.

This isn't exactly a feature that a browser generally supports.

I think that an app, such as OpenVPN Connect, or the Wireguard app would work better

These apps work across entire OS. I would prefer only the browser.