For Firefox:

Auto Tab Discard: makes living with a hundred open tabs manageable.

Copy Selected Tabs to Clipboard: allows copying the tab title + address in various formats like Markdown. (There’s also an addon like this for links, I forget what it’s called.)

Imgur redirect blocker, Load Reddit Images Directly: block the webpage wrapping for images on Imgur and Reddit

Leechblock NG: blocks specified sites after a certain time spent on them. Useful for Reddit and such.

Lemmy Keyboard Navigation: a sliver of the functionality of Reddit Enhancement Suite

Save In: to quickly drop an image or a file download into a particular directory under the downloads folder

Search By Image: self-explanatory

Swift Selection Search: when text is selected, shows a popup to search it on various sites. Useful to invoke Wikipedia, Wiktionary, IMDb, etc.

Temporary Containers: like a private window, but in tabs instead, and with multiple private sessions at once. Plus the tabs survive browser restart.

Viewhance: proper image viewer in the browser, with zooming, rotating, etc.

Stylus and ViolentMonkey: to patch looks and behavior on sites that I use often.

I advocate for a fork of uBlock: adnauseam. It’s a bit financially adversarial which I deeply enjoy, at the cost of using a bit of data. In theory if it built up enough users, advertisers would stop buying clickable ads all together.

SteamDB adds a ton of functionality to Steam and makes it very usable

Pretty niche but I find this useful at work.

https://github.com/aklinker1/github-better-line-counts

TTV LOL PRO - Adblocker for Twitch specifically (Varying success)

UserAgent Switcher - Website ever complain that you’re not using Chrome/Edge? Make it think you are!

Consent-o-matic - Pissed off unchecking all those ‘legitimate interest’ cookies notices? This does it for you automatically so you can ignore it.

On mobile, will ad links later on.

WebToEpub - convert Web Novels (and other web pages) into an EPUB for offline reading. Works with many sites, including: 1. ArchiveOfOurOwn.org 2. FanFiction.net. 3. royalroadl.com
etc…

Works well, although I would recommend supporting the official release or giving the authors some sort of $$. Its helped archive a couple of old comics, stories, and fan fictions of terrible quality ;).

Has netflux been removed since you made the post? Because I can’t find it on the Firefox addon store?

Couple simple ones, but maybe not as known as they could be:

• Mouse gestures: right-click and draw very simple line patterns to issue dozens of various browser commands.
• Search by Image: convenient shortcut to reverse-image search via up to 8 different useful services.
• uMatrix: security plugin that lets me specifically block / enable javascripts for any site across 8 different categories of functionality. Like an ad-blocker, it lets me enable just enough to allow me to reap a site’s goodness, while automatically shutting down any other fringe stuff it may want to do.

Lemmy instance assistant https://addons.mozilla.org/en-GB/firefox/addon/lemmy-instance-assistant/

Basically helps find posts and communities on your home instance

So, not uBlock or whatever as everyone’s aware of that.

Alas, not that many people know about it. If they were, they would not be using Chrome-based browsers as the new (& neutered) version of uBO for chrome is rather limited.

Beside uBO, I barely use any extension as it can do (well) so many things already beside blocking ads: fingerprinting, removing cookies popup and consent notifications, removing all the shit I don’t want to see from most websites (looking at you, YT Shorts):

• Dark Reader, because dark mode doesn’t blind me ;)
• The Qwant extension (my search engine, next to Kagi)
• and three extensions just for YT: ‘Improve YouTube!’, ‘Enhancer for YouTube’ (to remove a lot of the crap YT insists on pushing to us) and ‘SponsorBlock’ (to remove video embedded ads).

Save the Qwant one, they all are in the ‘recommended extensions’ section on the Mozilla website. (edit: I think so, I have not checked)

On the browser I use for more personal/private stuff I don’t have any extension beside uBo… I would not go on the Web, or barely on a few selected websites, without using uBO to be honest: every time I’m faced with a non uBO-protected browser I feel like dying. Too much tur… ads, I mean. It’s just not tolerable.

Maybe not that unknown, but:

Vimium - lets you control the browser by keyboard. It uses vim keys for navigation, but I think it’s useful for non vim users too because it also has a mode that adds text ‘hints’ for all the links on the page so you can click them by typing (I’m not describing it well so just check it out)

Maybe it’s not news to anyone, but I can’t live without Imgur. Point to a pic, it expands, that’s it. Can’t imagine surfing the internet and having to click on everything I want to see. Monstrous.

Bypass paywalls clean d

uBlacklist

It hides undesirable results in a variety of search engines. Just note that only Google is enabled by default and you’ll need to manually subscribe to some lists to get started.