I do not do anything where colour is critical, and so can not help, but maybe reading this will help:

• ICC color correction in Firefox

i had seen that but it's old and already addressed the previous issues in older versions of firefox. the newer version is where i'm suddenly taking on this slightly blue tint, even with srgb color profiles. i've attached images to show the difference in color shot with the same background in a lightbox. the blueish tint is applied only in FF whereas the neutral tint had to be manually manipulated in photoshop to show up properly in firefox and took FOREVER. meanwhile, in photoshop, the image with the blueish tint appeared to have the same neutral background before it was brought over to the browser.

That can be caused by a problem with the color profile for your display monitor or color profiles embedded in images.
You can disable color management to test that.
You can set the pref gfx.color_management.mode to 0 on the about:config page to disable Color Management.
You need to close and restart Firefox to make the change effective.

See:

• http://kb.mozillazine.org/gfx.color_management.mode