I want to resize my web browser to be a higher resolution than my screen.
I remember being able to do this in Windows 95 by setting the desktop resolution higher than the monitor resolution. How can I do it in Ubuntu?
This answer describes actually how to increase the whole desktop resolution beyond physical resolution and not only a specific window:
Panning viewport
If you want to have a panning viewport, i.e., a virtual screen that's bigger than your physical screen that moves when you move the mouse to the edge ("zoomed in" view) specify the desired physical resolution with --mode and the virtual screen size with --fb and panning area (typically same as virtual screen size) with --panning. For example,
xrandr --output VGA1 --rate 60 --mode 800x600 --fb 1280x1024 --panning 1280x1024*
on https://wiki.ubuntu.com/X/Config/Resolution
HTH
