Thank you for the reply, I will check it out later.

I usually have “DNS over HTTPS” in Librewolf disabled as another program is already “managing” secure DNS for my entire device. However, this isn’t saved once I close the browser and the setting is reset to use Mozilla’s DNS server.

Depends on the exact country, as a local broker will (usually) handle taxes automatically for you. Of course you can do them yourself but in some European countries this could be time consuming and complex.