Snapping, what a good idea.
What would be better, though, is if I snap my Firefox browser, say, to the left, that it resizes so it fits all the content I can see into the space. Instead of having to scroll left right. It shouldn't be too hard, a great majority of websites are centrally aligned anyway, snapping would just make the central alignment fill the open browser.
Is there a Windows or FF add-on which will sort this out? Or is there a provision for this somewhere that I haven't yet found!?