It should be zen, i'm mildly upset I didn't start using it earlier. Randomly decided to try new browsers and goddamn, it's all I wanted from workspaces and tabs and I didn't even know it. I always tried to use workspaces before but hated how it worked.

I also never bothered to check for tab based extensions because some similar ones do exist.

In zen you have your tabs vertically stacked, hated it at first, but I get it now, I actually can keep track of them all, swapping workspaces is easy/quick and doesn't suspend all tabs when you do it so you can have multiple categories open without them pausing when you swap. Like a seperate space for research, tutorials, etc. Those spaces can have folders and pinned tabs. On top of that you get essential tabs which are always visible as app icons and easily accessible so you can have youtube as an essential tab and easily hop back and forth accessing it from any workspace. My biggest gripe with workspaces before was having to reopen youtube videos when I swapped workspaces becuase they would suspend and not be accessible.