And why you should?
The reason is simple: to see the most exact color.
One way to find out is to view or print this page using your system.
The test image uses a mix of unusual ICC version 4 and version 2 profiles, one for each quadrant of the image.
By default firefox have color management disable.
Install your monitor drivers and turn on color management in firefox.
As usual insert
about:configin address bar, them:
gfx.color_management.enabled -> trueby the way, text smoothing:
gfx.use_text_smoothing_setting -> true
restart firefox and test again the link in the beginning.
All should appear as one continuous color image.
For calibrate your monitor, brightness and contrast try this page:
You should see all the blacks tone and white tone distinctly.
Hope this information is helpfull