I knew these tiling managers exist for tabs, but I wanted to take a slightly different approach on multitasking. TabFloater is primarily useful if you use your browser in a single-window mode. Within one window, it's impossible (AFAIK) to arrange tabs the way you mentioned, you would need separate windows. If you'd like that functionality, the above linked extension should work great.
I knew these tiling managers exist for tabs, but I wanted to take a slightly different approach on multitasking. TabFloater is primarily useful if you use your browser in a single-window mode. Within one window, it's impossible (AFAIK) to arrange tabs the way you mentioned, you would need separate windows. If you'd like that functionality, the above linked extension should work great.