I would like to make a screen capture for an app (Firefox), but I am using a macbook, so the display is at 1280 x 800.
I think if I can somehow resize the window to 1920 x 1200, then I can use
Command + Shift + 4 and then space bar, and then mouse click on that app
to capture the whole app's window (which will be bigger than the screen)
So I can resize the window horizontally to 1920 by dragging the window to the left, and then make it wider by going to the bottom-right corner of the window.
But there seems to be no way to make it taller...
on the Firefox address bar (URL bar) won't work... it can make the window wider than the screen, but not taller.
Is there any method at all?