No one mentioned Privacy Badger yet. Is there something I don't know?

Ublock origin Sponsor Block
Foxy Gestures

Many commenters mentioned ublock, but don't forget to enable additional filters for shit like cookie banners or other annoyances

Surprised no one posted this link: https://awesome-privacy.xyz/security-tools/browser-extensions

Great resource btw, check out the website for other tools.

JShelter and Decentraleyes. And uBlock Origins, but it's already popular without me. :)

Library extension. Go to as page selling a book (Amazon, Powell's, etc.) and the extension will show you if you're local library has the book, how many copies, and if they're available for checkout. You can then click through and put a hold on the book.

Great cure for impulse buying of books. I've read more and bought less since using it.

Ublock origin and privacy badger

What do people think about "I still don't care about cookies"?

Remove YouTube Suggestions (assuming you still use the YouTube client directly).

Also, Tampermonkey, to install single-site scripts that you can customize and with more limited permissions.

ublock origin and umatrix, anything else only makes you more fingerprintable

ublock orgin stylus if u use user styles and sidebery

Apart from those already mentioned I need Sidebery

It's not about privacy per se but Tridactyl "A Vim-like interface for Firefox, inspired by Vimperator/Pentadactyl." because, like Userscripts - Tampermonkey, you can basically redesign any website.

A basic privacy oriented solution I made was using autocmd https://tridactyl.xyz/build/static/docs/modules/_src_excmds_.html#autocmd to redirect YouTube content to my local https://github.com/user234683/youtube-local and that works even with embeds.