So maybe a combination of a good VPN and HTTPS can help me in this matter? I don’t want to disable Javascript either. But I’m interested in this browser theme, I’ll take a closer look. In any case, I don’t want to expose hardware data. Such as e.g. Steam or GOG also collects (CPU, motherboard, GPU and even their unique identifiers). But this is just an example, the point is that I don’t want to release these either, even if I have to forget the quick login because of it, or something like that.

Thanks for the explanation, the picture is starting to clear. Changing the MAC address is not absolutely necessary. Can choosing and using a good VPN hide the data I mentioned? I think only if I don’t intentionally provide them somewhere, say in the form of a cookie or data sheet.