Here’s a list of those I have installed:

• uBlock Origin https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/
• Consent-O-Matic https://addons.mozilla.org/en-US/firefox/addon/consent-o-matic/
• SponsorBlock https://addons.mozilla.org/en-US/firefox/addon/sponsorblock/
• Youtube-shorts block https://addons.mozilla.org/en-US/firefox/addon/youtube-shorts-block/
• ClearURLs https://addons.mozilla.org/en-US/firefox/addon/clearurls/ (no longer needed since last update afaik)
• Proton Pass https://addons.mozilla.org/en-US/firefox/addon/proton-pass/ (or bitwarden if you use a password manager)
• Bypass Paywalls Clean https://gitlab.com/magnolia1234/bypass-paywalls-firefox-clean
• LibRedirect https://addons.mozilla.org/en-US/firefox/addon/libredirect/
• Firefox Relay https://addons.mozilla.org/en-US/firefox/addon/private-relay/
• SteamDB https://addons.mozilla.org/en-US/firefox/addon/steam-database/

Some that haven’t been mentioned yet:

• Behind The Overlay (removes simple login banners/paywalls/anything that blocks the content)
• Don’t Fuck With Paste (for those sites that think it’s fun to override or even disable copy and/or paste)
• Greasemonkey/Tampermonkey

As a college student, my must have plugins are

• DarkReader
• Firefox Multi-Account Containers
• Sponsorblock
• TWP - Translate Web Pages

and the goat itself, >!uBlock Origin!<

Dark reader https://addons.mozilla.org/en-US/firefox/addon/darkreader

Any extension to re-enable right click. It’s annoying when they try to block me from downloading a picture/video, copy pasting, or inspecting elements

Must have:

ublock origin.

Optional:

Cookie auto delete.

Nitter redirect.

Sponsor block.

Some that I use:

Dark Mode

I don’t like having a light screen.

• Dark Reader. This does a pretty technically-impressive-to-me job of making reasonable dark versions of pages. It’s not perfect – there are a handful of sites that it needs to be toggled off for, makes something hard to read – but I’m amazed that it does the job it does.
• Blank Dark Tab: Replace the new tab with a blank page matching Firefox’s built-in dark mode

Privacy/Anti-Tracking/Ad-blocking

• uBlock Origin. Ad blocker.
• Privacy Badger. Targets cross-site tracking, EFF project.
• Decentraleyes. Targets CDN tracking.

Paywalls

Some paywalls can be bypassed.

• Bypass Paywalls Clean

Tweaking Frameworks

• Stylus: Doesn’t do anything on its own, but permits collections of third-party themes to be applied to websites to fix annoyances.
• Greasemonkey. This doesn’t do anything on its own, but it permits people to publish little modifications to be applied to webpages, permits for a lot of little scripts that fix annoyances on websites. There were a number of useful scripts that I used on Reddit.

Misc

• Edit with Emacs. Permits opening the contents of a textarea in an external emacs instance. Nice for things like, say, writing a large lemmy post in Markdown. I vaguely recall that, at least some years back, there was a way to embed a version of vim in Firefox textareas, so if vim’s your cup of tea, that might be interesting, if it’s still around.
• Instance Assistant for Lemmy and Kbin. A variety of quality-of-life fixes for lemmy and kbin. Lets one open a given lemmy/kbin post on their local instance if they wind up viewing a page on a remote instance.
• Reddit Enhancement Suite. If you still use Reddit, this has an enormous collection of quality-of-life improvements for Reddit.

EDIT: I don’t know if this is the embedded vim that I recall, but Firenvim seems to do roughly the same thing, if not.

EDIT2: There’s also some “overlay remover” plugin that can bypass a number of obnoxious overlays that I use on my desktop, but I don’t have it installed on this machine. I think that it’s Behind the Overlay.

recipefilter.

Makes most recipes appear as a modal dialog covering the stupid blogspam that the sites put up.

There’s another one that I can’t remember the name of on my desktop computer that allows you to block domains from web searches. Like pinterest.

• DownThemAll!

• Firefox Translations

• Imagus

• uBlock Origin

• Grammarly

Don’t have Firefox but the first plugin you must install on any browser or turn in your browsing license is uBlock Origin.

I recommend:

1. Ublock
2. Sponsor Block for Youtube
3. Return Youtube Dislike
4. Hide Shorts for Youtube (I actually like shorts, but only on my phone)
5. Stylus
6. Decentraleyes
7. Don’t Accept image/webp
8. Rotate Image (rotates images in 90 degree increments)

Ublock Origin or AdGuard Containers

LibRedirect for me, works well on both desktop and android

Obviously, uBlock Origin. Others are multi-account containers, facebook container, privacy badger, bitwarden (if you use it as a password manager), and keepa (if you shop on amazon).

Dark Reader
uBlock Origin

Optional:
TWP Translate (is better than the new feature)
Tabliss (Another take on the “new page” in chrome)