see https://bugzilla.mozilla.org/show_bug.cgi?id=709732 please apply patch from https://bugzilla.mozilla.org/show_bug.cgi?id=709732#c7 fix confirmed
Patched xulrunner and all looks fine now... firefox displays colors like eog, gimp, shotwell now. Here are some precompiled x86_64 rpms for you to test the difference. http://harald.fedorapeople.org/xulrunner-11.0-3.fc18.0.hh.1.x86_64/
Patch needs to have positive review, then we can apply it to our packages. I've noticed author of patch about it.
Big plus one from me. It's bad enough firefox is only compatible with V2 profiles, but not respecting _ICC_PROFILE makes it basically unusable for a color geek.
Patch added to next release (FF15). It will be officially fixed in FF17.