Hi firefox crew! Okay, I know how to work the tab groups. But I'd like to be able to open a window(or tab) side by side with one or more others, as often I want to compare a couple sites/web pages. I really would rather be able to easily do this! So I'm wondering: is there any way to, say, choose some setting or option/customize to have firefox automatically open a second window (or tab) as a half-window, whilst shrinking the first fullpage down to the other half of the screen (or window)? And, even better would be if I could select a few tabs of my choosing at once (eg. by ctrl-clicking each one i want from among the tabs i have open along the tabs bar, say, A, C, E, and F out of all my 7 tabs A-G), and right-click to bring up a context menu, and from there select an option: "open tabs in a grid", and have that work to display (all four of) these tabs side by side. (And, theoretically, each successive tab/window opened in this manner would effectively add to the grid, thereby shrinking each one proportionately.) Any ideas on how to make this work? Much appreciated!