Which below statements are accurate

$$ One of the ways to defend from XSS $($cross$-$site scripting$)$ attacks is to use HTTP$-$only cookies which will not be available to JavaScript running in the browser.

$$ In web applications security model applications are isolated and sharing of data between them is difficult.

$$ WebAuthn is not supported by popular web browsers, making it less accessible to users.

$$ CSRF protection should be implemented server$-$side, rather than relying solely on client$-$side scripting.