is it possible to setup a button that will stretch firefox to 2 screens at a set size/then back to same position as it was on monitor 1?

in screenshot 1 you will see how it looks on monitor 1 (precisely where i want it), and in screenshot 2, how i would like it to look when i click set button on titlebar monitor 1, if i could click a title bar button that would automatically set it to that size/position on monitor 2 while keeping 1's position, then click same button on titlebar monitor 2 and it would go BACK to same position on monitor 1...that would be stellar!
Thanks guys!

* once that's tackled... a tougher task,notice the line going across image2 (this is where monitors are divided) is it possible to add a command that states if firefox in multi monitor mode, then where a sentence ends scroll a hair up OR down so as to keep all text on one monitor and not split that sentence/paragraph. see photo 3 where it's circled in red... sentence spans both monitors and can be tough to read sometimes, so if display fusion/firefox could analyze where is the paragraph/sentence going to end, auto move it to fulfill on one monitor, and start next sentence/paragraph on next monitor.

maybe i'm asking for miracles w/ this one!?

thanx John for speedy/detailed reply!
Works awesome, just as i hoped for!
enjoy your day!