You can always run browser in a vitrual machine. Or open it with a text browser like Lynx or Links. Or use wget to download the file and read in text editor.
Obviously, VM should have no access to audio outputs, display driver should be rewritten to scramble output to be only viewable using a Lenslok-like device and the whole setup should run on a isolated computer staying in a clean room with a dead-man switch installed that - in case of unforeseen consequences - would quickly power a whole apartment down and call for emergency.
I think you're neglecting to consider the possibility of seismic communication by doing a lot of client-side computation to make the CPU fan kick on and off.