My setup at home. Most lights on my keyboard are broken, but it still works

Finally made the switch. Full-time Linux everywhere! I figured out that all games I play already have Linux support since some time^^
And it feels good! So fast *_*

Question to all JS Frontend Devs: What light and performant library can you recommend me today?
I'm a C++ dev who is a bit anxious about performance, load times etc. and before I stuck my nose into vanilla js, maybe there is something better/faster. I'm a total frontend noob, e.g. I heard that html tables aren't a thing anymore and that I should use divs?
My task is quite simple, I want to give the users the ability to press some buttons and drag and drop stuff around instead of modifying the URL per hand :/
So if someone could point me in the right direction, that would be awesome!

My Tabmanagment, or the lack of it.
When I'm in problem solving mode I have easily 40tabs+ open, because I might need some which are already open. I distinguish them by the favicon of the Google tab. Each Google tab and the following tabs are separate problems/tasks so I kinda have a timeline "the one in the middle was the problem I had 30mins ago".
I also have no bookmarks, I start always with min. 5 Tabs. I guess I don't know how to browser :|