Centering Images in Firefox?

So, I got a new widescreen monitor today, and I was curious if there was any way (via a script of some kind, add-on or whatever) to have images in a tab load in the center of the screen rather than justified to the left, as is the default. If anyone knows of a way to go about doing this, I would greatly appreciate it. Thanks!

>>4
It holds the helpful implication that your only choice beyond IE is Firefox, a favourable outcome for Mozilla whose browser is pretty shitty compared to any other one in the world (in terms of security flaws, bloat, slow release schedule, etc)

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