Firefox

• ublock origin (not just ublock)
• bitwarden as password manager
• Bypass Paywalls https://gitlab.com/magnolia1234/bypass-paywalls-firefox-clean

Some extensions used by me:

• uBlock Origin
• Firefox Translations (works on-device)
• LibRedirect (redirects from certain sites (like youtube) to their frontends (like invidious))

For android I also use Android PDF.js, to view pdf files on mobile.

uBlock Origin is just required for me to block ads and other annoyances. Generally I also use it to block the annoying cookie popups instead of clicking any of their buttons instead of opting for a different extension, like I don't care about cookies.

I also almost always have Tree-Style Tab, though I've found that it can cause Firefox to be non-performant on memory-constrained devices. This extension gives you a tab sidebar (using a similar interface element like the bookmarks sidebar) that organizes your tabs in a tree. I will often have hundreds of tabs open normally, and this makes them more manageable, as I middle-click everything to open things in a new tab, particularly when I'm researching. It gives a nice rudimentary tree view of what content related to what, like if I'm on a Wikipedia dive or TV Tropes dive.

I also usually have Tampermonkey, as I usually want to make a website more accessible. A lot of the time, it's simply so I can autofill usernames in a text box, because the website might have the login flow split between pages, and Firefox does not recognize or allow me to select an autofill the username for me. Other times, it's to automatically click through that annoying Microsoft login flow "Keep me signed in? (Don't ask as often)".

For watching YouTube, I use the SponsorBlock addon, because sponsored segments have become very annoying, though some creators have been able to make them actually fulfilling to watch.

On Android Firefox, I also get Disable Page Visibility API. This allows me to use YouTube in Firefox and even background the app and listen to music that way. Plus, with uBlock Origin, I am also able to block ads. I also sometimes install this on different profiles for situations where I believe the web app may try to detect my visibility, such as an online coding test for job opportunities where it will not want me to change windows to look up answers or type code into a compiler (this saved me during a C++ multiple choice exam which asked many times "Which of these is invalid C++?" and "What is the output of [this complicated code block]?").

The below is for my work computers only, because I generally don't need them otherwise.

I will additionally have Firefox Multi-Account Containers and couple that with Simple Tab Groups as I have 6 logins, with one particular site requiring 3 of those logins. I essentially configure the URLs I need to be in certain groups, define one container for each, and then have a couple of default tab groups set as sticky groups that will allow all containers to stay as those containers so I can use multiple sites side-by-side. The interaction with Tree-Style Tab can be a bit janky, especially when configuring new catch tab regular expressions, but usually disabling and re-enabling both Tree-Style Tab and Simple Tab Groups will fix that. Mostly I do this, because my company refuses to fix their SSO breaking due to weird cookie issues, and it's pretty nice to be able to clear cookies for a particular tab group easily.

To clear cookies, and because I do that very often, I use Cookie Quick Manager. I can clear a tab group's entire cookie set by having a tab selected in that tab group, then using "Delete current Context Cookies" and usually that will fix my login issues, and also keep my logins to other sites. For my personal use, I generally don't need to clear cookies, or using a private window, clearing per-site via the web console, or clearing in settings is good enough.

Since I do a bit of web troubleshooting, Modify Header Value is pretty nice. I can call API endpoints that require a subscription key from my browser, even using the web console, and I don't need to worry about figuring out if my headers are correct. I can also get my team to get this add-on so they can do their basic troubleshooting. For my personal computer, I'm much more free to create ad-hoc scripts to test things that I can save somewhere, as sending others scripts in my organization also comes with implicit hours of training and coaching on how to use them (and our leadership has been very sensitive to explicit training hours to get everyone up to speed).

Finally, User-Agent Switcher and Manager for the sites that are built for Chrome, but have worse performance or broken features on Firefox, yet they work fine when Firefox sends them a Chrome user agent. Thankfully, I rarely have a use for this on my personal computer.

Dark reader is a good one. It alters websites so they're dark mode, even if they don't officially support.

uBlock Origin is a must for ad blocking. Anything else is just extra flavour. I like SponserBlock and Return YT Dislikes.

1. Inoreader
2. Bitwarden
3. uBlock
4. Sponsorblock
5. Dark Reader
6. Font Changer
7. Stylus
8. Markdownload - web clipper
9. Lasttab (Alt_Z back to last tab) A. Violentmonkey B. webcompat.com reporter C. Wikiwand D. YouTube Redux

uBlock, Bitwarden, Violentmonkey, Stylus are my top extensions.

Fwiw, this is the kind of thread I used to love The Other Site for. Glad to find one here!

Firefox is great mostly on its own, and I only use two extensions:

• uBlock Origin: Enough said.
• Disable Javascript: Works great for getting around a lot of paywalls.

I'm on mobile at the moment, but one I haven't seen mentioned is force allow right click. Super useful for websites that won't allow you to copy images or download a video off their site. Won't always work with the second one, but can if the web developers lazy.

I like to recommend Privacypossum, it returns garbage data to tracking companies: https://addons.mozilla.org/en-US/firefox/addon/privacy-possum/

• sidebery
• enhancer for yt
• multi account containers
• privacy badger
• ghostery
• ublock origin

ublock origin bitwarden cookie autodelete dark reader copy plain text mastodon or graze noscript sponsorblock and occasionally grammarly complete black theme

https://github.com/arkenfox/user.js/wiki/4.1-Extensions

It would be literally impossible for me to do my job effectively without Sidebery for container management in FF. As someone with multiple accounts used for various CSPs and other services, being able to spin up an environment with no irrelevant cached user sessions is something I depend on heavily (looking at you, Azure).

My current stack:

• uBlock Origin, as others have stated, is a necessity basically
• Adguard AdBlocker seems to work well for blocking ads on Twitch and other sites
• Adguard Extra adds additional blocking for Twitch and other sites, can be installed from the Adguard team's GitHub repository
• Sponsorblock as others have said is also basically a necessity for YouTube. It auto-skips sponsored segments, baked-in ads, etc.
• Tampermonkey as others have also said, allows you to run userscripts. One big example that is relevant to this site is Lemmy Universal Link Switcher which automatically fixes links on Lemmy to work with your home instance
• Dark Reader already mentioned, but implements dark mode on any website, some issues, but works great for most sites.
• Facebook Container keeps Facebook isolated in its own container to prevent tracking/privacy invasions, etc.
• Bitwarden mentioned by others as well, is a password manager makes life a lot easier instead of remembering 500 passwords.
• Privacy Badger privacy add-on that sends the Global Privacy Control signal to opt you out of data sharing and selling, and the Do Not Track signal to tell companies not to track you. If trackers ignore your wishes this add-on will learn to block them.
• Bypass Paywalls Clean also mentioned by others, blocks paywalls on various websites, such as news, etc.
• Firefox Translations Translates text or web pages locally instead of using any cloud services like Google Translate does
• Firefox Multi-Account Containers previously mentioned, but separates website storage into tab-specific containers. Cookies downloaded by one Container are not available to other Containers.

savefrom.net downloader extension

Vimium C - All by Keyboard – Get this Extension for 🦊 Firefox (en-US) https://addons.mozilla.org/en-US/firefox/addon/vimium-c/

It's important to know that having lots of extensions isn't great for security. Each one carries the possibility of exploits, so make sure you actually use the extensions you have! That being said, a lot of security issues are directly addressed by extensions, for example adblockers are the best option for avoiding malware imbedded in ads, and ublock origin specifically has a filter for lan intrusion. There are lots of great suggestions here already, don't be afraid to try them out, but also don't leave them installed if you don't end up using some of them.

• Bitwarden - Password manager
• Containerise - help to easily manage your Firefox containers
• Dark Reader - converts bright white web pages to dark
• Facebook Container - isolates FB's crap into it's own container
• LibRedirect - redirects common platforms, such as Google/FB/Twitter/YT/etc, to alternate frontends such as SearXNG/Nitter/Invidious/etc.
• Owncast Extension - allows me to see who is online on Owncast that I follow
• Privacy Badger - obviously privacy
• ProtonVPN - Obviously ProtonVPN
• Sponsorblock - skips sponsorships in videos even works on Invidious
• Temporary Containers - allows me to have a container for every tab as it opens a new container everytime I open a new tab or window
• Terms of Service; Didn't Read - gives you a grade on how bad a website's TOS is from A-F
• uBlock Origin - privacy blocker
• Video Speed Controller - allows me to speed up videos

• Tree Style Tabs
• Tab Session Manager

Must-have addons for tab hoarders like myself.

• Bypass Paywalls Clean
• Copy PlainText
• Easy Youtube Video Downloader Express
• Feedbro
• Flagfox
• FoxClocks
• Grammar Checker & Paraphraser – LanguageTool
• Library Extension
• OneTab
• Print Edit WE
• Resurrect Pages
• Search by Image
• The Camelizer
• uBlock Origin
• Unhook - Remove YouTube Recommended Videos
• Video DownloadHelper

Ublock Origin and Adblock Plus

One that is more specific to Lemmy, which I am working on

https://lemmy.ca/c/instance_assistant

While this is extension is mine and I have an obvious bias, I am using the extension constantly for my personal use as well. Might be nice for others too :)

In addition to ublock,
I would also suggest

• decentraleyes
  Stores commonly used librarys localy,
  instead of downloading them from a third party.

• clearURLs
  Removes tracking parameters from links.

• google search fixer
  Shows the more advanced search features,
  That firefox for Android currently doesn't get

• video Background Play Fix
  What the name says,
  Good when you use youtube in the browser.

• I don’t care about cookies
• iCloud Bookmarks
• Undo Close Tab Button
• uBlock Origin
• Facebook Container
• Bypass Paywalls Clean
• AdBlocker for YouTube
• Video DownloadHelper
• Bitwarden
• NAS Download Manager
• Better TweetDeck
• The Camelizer
• YouTube mp3
• Simple Tab Groups

https://github.com/arkenfox/user.js/wiki/4.1-Extensions

Dark Reader, LibRedirect, LanguageTool, TreeStyleTab, Return YouTube Dislike, uBlock Origin, Decentraleyes, DeArrow, Auto Tab Discard

• My O'Reilly Downloader - if you have an account already, but want to persist some material to peruse at a later time
• TreeStyleTab
• ContainerProxy - I have mullvad running in gluetun container on my desktop PC, and it exposes HTTP proxy endpoint over Tailscale, so I can have VPN for my webbrowsing, without having to connect. This does not give me full protection, but I use tailscale a lot, and it doesn't play well with Mullvad.
• I Still don't care about cookies

A few that no one has mentioned yet:

• Don't "Accept" image/webp
• Clickbait Remover for Youtube
• Redirect AMP to HTML

If you use Steam a lot:

• Augmented Steam
• ProtonDB for Steam
• SteamDB

• uBlock Origin
• ClearURLs
• Bitwarden
• ReturnYoutubeDislike