I'm using Firefox:

1. uBlock
2. Darkreader
3. Privacy Badger
4. NoScript
5. uMatrix
6. Bookmark Dupes
7. CanvasBlocker
8. ClearURLs
9. YT Enhancer
10. FF Relay
11. Open in Private Mode
12. Open Tabs Next to Current
13. Secure Password Generator
14. Toggle web custom fonts

I highly recommend checking out Firefox Multi-Account Containers.

• Bitwarden
• FoxyProxy
• DuckDuckGo
• AdBlocker Ultimate
• Privacy Badger
• LocalCDN

Bitwarden
Custom New Tab
Decentraleyes
OneTab
Privacy Badger
Proton VPN
uBlock Origin

Here's my list. Using OperaGX.

• Bitwarden
• Buster
• Consent-O-Matic
• Dark Reader
• FastForward
• Picture-in-Picture
• Stylus
• TamperMonkey
• The Stream Detector
• uBlock Origin
• Session Buddy
• Return YouTube Dislike
• Looper for YouTube

Here are the plugins I use:

• React Developer Tools (useful for developing with React)
• Ublock Origin
• Return Youtube Dislike
• SponsorBlock
• Grepper (shows convenient code snippets when I Google stuff)
• Cold Turkey Blocker (I use this to to block websites/apps when I need to focus)
• Shinigami Eyes (highlights queer friendly and anti queer subreddits/users/facebook pages/group differently)

• UBO
• DDG Privacy Essentials
• LocalCDN
• Cookie AutoDelete
• TamperMonkey
• LibRedirect
• Keyboard Privacy

More than I feel makes sense to post TBH. But a few important ones (for Firefox):

uBlock Origin
Sidebery to get my tabs in a vertical tree; if you often have more than 10-15 tabs I really recommend this!
Bitwarden (password manager)
Checker Plus for Gmail + Checker Plus for Google Calendar, easy-access email/calendar in a small window, I very rarely actually go to gmail.com
Return YouTube Dislike
Tampermonkey for userscripts on Kbin
Video Speed Controller, I use numpad +/- to increase/decrease speed by 0.25x, works basically everywhere including YouTube

I have these extensions pinned:

• uBlock Origin
• Firshot (takes screenshots of website with scrolling)
• Google Translate
• Wolfram Alpha
• Tampermonkey (let's me write/add scripts to websites)
• Just a clock (I hide my windows startbar so having a little clock always displayed is nice)

And my remaining extensions are:

• Alternate Player for Twitch.tv
• BetterTTV
• Chrome Remote Desktop
• Confetti Snippets (adds copy button to code on Stack Overflow)
• DeArrow (Crowdsourced titles and thumbnails to remove clickbait from YouTube)
• Enhanced Steam
• Google Docs Offline
• ~~HTTPS Everywhere (changes http links to https)~~
• JSONVue (formats and makes json collapsible)
• Lighthouse (tests website performance)
• Netflix Extended
• Reddit Enhancement Suite
• Refined Prime Video
• Resource Override (let's me replace requested web resources with local versions of those files)
• Return YouTube Dislikes
• Save All Resources
• ShareX
• SponsorBlock
• SteamDB
• Tab to Window/Popup (adds keyboard shortcuts to between normal browser windows and the popup windows that don't waste space with a title bar, useful for vertically split window layouts)
• uBlacklist (block sites from Google search results)
• View Image (returns view image option to Google Images)
• WAVE Evaluation Tool (tests website accessibility)