I highly recommend checking out Firefox Multi-Account Containers.

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

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

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

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

• AdGuard Extra

• AdNauseam (uBlock Origin fork)

• Bitwarden

• Clickbait Remover for Youtube

• Custom Scrollbars

• Don't accept image/webp

• Enhancer for Youtube

• Proton VPN

• RES

• Return Youtube Dislike

• Sponsorblock

• Thumbnail Rating Bar for Youtube

• Tree Style Tab

• Translate Web Pages

• uBlacklist (no more deviantart trash in image search)

• Redditsave (probably won't need this anymore since i moved here)

• vidIQ Vision for Youtube (information on screen pleases me)

• Violentmonkey

• Youtube-shorts block

and thanks to the based commenters here, learned there were some userscripts for kbin and got the Dark Reader extension

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)