Firefox 3 and colours (colors for the americans)

FF3 supports color profiles so that your photos will look the same in FF3 as they did in photoshop, but you have to manually turn it on.

Go to http://www.color.org/version4html.xalter to see the ICC profile test.
If the sky in the photo is half green your profiles aren't enabled.

Go to about:config and set gfx.color_management.enabled to True.
Restart Firefox.

Then go back to http://www.color.org/version4html.xalter and see if it changes.