Changing user content?

I've been waiting for 3.6 for a good while because I do pixelart, I watch it on several sites and the blurred zoom is simply unacceptable for me.

3.6 is the first version in which you can disable the zoom filters when you zoom in, so that you can see the perfect squared pixel, but unlike friends with regular firefox I cant seem to find usercontent, how should I go about disabling bilinear filter from zoomed in images?