To answer your question (Firefox on desktop and mobile):
- uBlock Origin
- Privacy Badger
- HTTPS Everywhere
- Enhancer for YouTube
- Multi-account Containers
- Owl
However, the single Firefox extension that's indispensable to me is Tree Style Tabs. See: https://github.com/piroor/treestyletab.
Is it possible (for a Web page hoarder like me) to organize and access 500+ tabs across seven Firefox windows? You betcha it is, with Tree Style Tabs.
This is what I'm using right now - https://pastebin.com/bKHM8hp9
I also shrink it down when the mouse isn't over it. See the screenshots for mouse out and mouse over look.
Mouse not over tree tabs: https://i.imgur.com/ikQhxTM.png Mouse over tree tabs: https://i.imgur.com/TyRds6V.png
Works well for me.
It has more sane defaults, even some animations, very accessible customization (e.g. you can theme every bit of bar in extension settings, not needing to go to chrome.css). It's also can be used as a basic browser "window manager", given that you can't split window into panes, but you can have multiple tab groups in one window and quickly switch between them.
What motherboard did you get to have one terabyte of RAM? :D
I remember finding out about it in a thread on reddit, they concluded that after this change there is no point in using privacybadger if you're already using ublock, for example.