"The rotation of images and extension processing
requires little CPU power. Anything manufactured after 2000 should
provide plenty of muscle for running the code presented here.
"In addition to Firefox, you'll need the Imager Perl module, as
well as Perl itself (see Resources). Although tested exclusively on
Firefox V3 and Ubuntu V7.10, the code should work on older versions
of Firefox and any operating system that supports Perl."