> That profile has both XYZ cLUT and matrix tags, so it doesn't prove anything > (ie. Firefox may be using the matrix tags). > > Graeme Gill. > Graeme, please read the explanation at http://www.colorkeeper.com/?page_id=235 once more. When I use Firefox 3.x, I got "Perceptual" image with red background but not "TRC processed" image. Firefox 3.x does use preceptual LUT if it exists in a profile.