These days Linux has far better hardware support than Windows. Including tons of older stuff that Windows abandoned.
The exception is stuff like "gaming" devices like nice/keyboards that have custom shitty apps for customizing them.
https://brave.com/ Use Brave browser. Same tech as Chrome, but without the Google spying.
Those are just the site names. They point to the actual site, which is hosted on some server somewhere.
Presumably the other names are registered with other registrars.