As far as I’m aware WS is pretty close to what you get by just using virtalbox (with an easier setup) so you could do that on Linux. With Linux you also have more advanced solutions though like https://en.wikipedia.org/wiki/Qubes_OS

One way to hide it for Firefox users.

<p class="not-firefox-warning">
    This site is designed for <a href="https://firefox.com/">Firefox</a>,
    a web browser that respects your privacy.
</p>
<style>
@-moz-document url-prefix() {  .not-firefox-warning { display: none; }}
</style>