Safari style sheet hide news feed and right panel.

safari.css

[role="main"] [data-pagelet="Stories"],
#ssrb_stories_end + div,
#ssrb_rhc_start + [data-pagelet="RightRail"],
[role="navigation"] [aria-label^="Watch"],
[role="navigation"] [aria-label^="Marketplace"],
[role="navigation"] [aria-label^="Gaming"],
[role="navigation"] [aria-label^="Home"],
[role="navigation"] [aria-label^="Groups"]
{
    display: none !important;
    opacity: 0 !important;
    pointer-events: none;
}

#ssrb_left_rail_end + h1 + [role="main"]:after {
    content: "News Feed is blocked.";
    display: block;
    color:  white;
    font-size: 20px;
    margin-top: 30vh;
}