I'm lazy, so I keep linking this screenshot. This is why I don't / can't leave Firefox: https://i.imgur.com/81OpEOy.png

I have so, so many tabs open. And when I need, I can reorganize in a tree structure and just collapse [other projects] tabs and leave them. Combined with "Auto Discard Tabs", I have hundreds+ of tabs open, with only a half-dozen using RAM. Works freakin' great for me, even on a laptop.

(note, this is Tree Style Tabs along with a userChrome.css hack to remove the tab bar; I'm okay with this tradeoff, normal extensions being able to hide the tab bar sounds like it would lead to issues.)