Hide Facebook Stuff — Stylish (https://extensions.apple.com/details/?id=com.sobolev.stylish-5555L95H45)

fb-stylish.css

#pagelet_trending_tags_and_topics,
#pagelet_ego_pane,
.rhcFooterWrap {
display: none !important;
}
[data-reactid*="$interestsNav"],
[data-reactid*="$developerNav"],
[data-reactid*="$pagesNav"],
[data-reactid*="$listsNav"],
[data-reactid*="$eventsNav"],
[data-reactid*="$groupsNav"],
[data-reactid*="$appsNav"] {
display: none;
}
#rightCol {
display: none;
}