Some useful filters you can put into uBlock Origin

filters.txt

! Generic rule to unjustify all justified text. Yes, you really need both rules.
! Test page: https://www.addameer.org/israeli_military_judicial_system/administrative_detention
! Test page: https://en.wikipedia.org/wiki/Typographic_alignment (needs !important)
! Test page: https://www.gwern.net/Screwfly (needs !important)
*#$#p:matches-css(text-align: justify) { text-align: left !important; }
*#$#p:matches-css(text-align: left) { text-align: left !important; }

! Set a line-height of 1.5 for <p> and <li> which do not already have a line-height specified by CSS
*#$#p:not(:matches-css(line-height: "")) { line-height: 1.5; }
*#$#li:not(:matches-css(line-height: "")) { line-height: 1.5; }

! Disable the awful "highlight" animation on all forums running Discourse
! Test sites: https://meta.discourse.org/ https://internals.rust-lang.org/ https://discuss.ipfs.tech/
*#$#article.onscreen-post > div.row > div.topic-body.clearfix.highlighted { animation: none !important; }
*#$#tr[data-islastviewedtopic].topic-list-item.highlighted { animation: none !important; }

! Horrible CSS-dancing "Share" thing that pops up after selecting text on a Discourse forum
users.rust-lang.org##.quote-sharing
internals.rust-lang.org##.quote-sharing

! Look for font stacks that include (consolas|courier|monospace) and force our default monospace font instead
*#$#pre, tt, code, kbd, samp:matches-css(font-family: /\b(consolas|courier|monospace)\b/i) { font-family: monospace !important; }

! Fix for Hacker News, which does not put the first paragraph of a comment into a <p>
news.ycombinator.com#$#.comment { line-height: 1.5; }

! Discord: no need to let people know we're typing
https://discord.com/api/*/channels/*/typing

! 'One tap' Google login on nytimes, quora, etc
accounts.google.com/gsi/iframe/$subdocument

! Ugly fonts
*/SourceCodePro-*.*
*/SourceSerifPro-*.*
*/FiraCode-Regular.*
*/FiraCode-Medium.*
*/FiraCode-Bold.*
https://svelte.dev/fonts/fira-mono/*
https://doc.rust-lang.org/*.woff
https://fonts.gstatic.com/s/sourcecodepro/*
https://fonts.gstatic.com/s/googlesans/*
https://fonts.gstatic.com/s/roboto/*
https://fonts.gstatic.com/s/lora/*
https://fonts.gstatic.com/s/firamono/*
https://www.i.cdn.cnn.com/.a/fonts/*
https://qsf.fs.quoracdn.net/*.woff
https://qsf.fs.quoracdn.net/*.woff2
https://qsf.fs.quoracdn.net/*.ttf
https://cdn.jsdelivr.net/font-hack/*
https://abs.twimg.com/fonts/chirp-*.woff
https://abs.twimg.com/fonts/*/chirp-*.woff

! Remove the linear gradient covering the article text after load, despite Bypass Paywalls and several uBlock Origin annoyances filters enabled
www.nytimes.com#$#div[class]:matches-css(background-image: linear-gradient(rgba(0, 0, 0, 0), rgb(0, 0, 0))) { display: none !important; }

! Hide the 'People also search for' slide-in box when going back on Google Search.
! We require the other attributes here to reduce the risk of false positives.
www.google.com#$#div[id^="eob_"][jscontroller][jsdata][jsaction][data-ved] { display: none !important; }

! Fix fonts on hexdocs.pm
hexdocs.pm#$#div#content { font-family: 'system-ui' !important; }

! Fix fonts on exploringjs.com
exploringjs.com#$#body { font-family: 'system-ui' !important; }

! Make danluu.com readable
danluu.com#$#body { max-width: 475px; margin: 1em auto; }

! Remove letter spacing on without.boats
without.boats#$#p { letter-spacing: 0 !important; }
without.boats#$#html { letter-spacing: 0 !important; }

! Ads and annoyances on criticker
criticker.com###i_bannerad
criticker.com##.i_bannerad
criticker.com###i_cookies
criticker.com###i_plead > div

! Remove banner on *.substack.com
substack.com###nojs-banner

! reddit's giant "recommended stories" boxes in comments
! https://old.reddit.com/r/rust/comments/988euh/how_rusts_standard_library_was_vulnerable_for/
old.reddit.com##.seo-comments
old.reddit.com##.seo-comments-recommendations.spacer
! reddit's big signup banner at the top
old.reddit.com##.listingsignupbar.infobar
! reddit's invitation to go chat
old.reddit.com###chat

! reddit's "go use the new design" banners
old.reddit.com##.redesignbetabar-js.redesignInfiniteScroll.onboardingbar.infobar > .onboardingbar-body
old.reddit.com##.redesignbetabar-js.redesignNightmodeBar.onboardingbar.infobar > .onboardingbar-body

! Flickr's signup box
! https://www.flickr.com/photos/146271943@N06/30935460978/in/explore-2018-09-20/
www.flickr.com##.signup-footer

! Dropbox signup overlay
www.dropbox.com###shared-link-immediate-signup-modal

! The New Yorker's in-article annoyances
! https://www.newyorker.com/science/elements/after-years-of-abusive-e-mails-the-creator-of-linux-steps-aside
newyorker.com###cne-interlude-1 > div
newyorker.com###RecircCarousel

! sourceforge's "get the latest updates" box
! https://sourceforge.net/p/ntfs-3g/ntfs-3g/ci/275edd5353639acfb85e4edb6f203126bf7f0d44/
sourceforge.net###newsletter-floating

! Video on fastcompany.com
! https://www.fastcompany.com/90270691/i-still-miss-my-headphone-jack-and-i-want-it-back
www.fastcompany.com##.siderail-video-module

! Bottom newsletter banner on https://www.cockroachlabs.com/docs/stable/known-limitations.html
www.cockroachlabs.com###newsletter-footer-popout

These go into 'My filters' in your uBlock Origin settings.