Images look different in Web Browsers
Not all web browsers are able to understand and use ICC profiles.Images Look Different in Web Browsers
Q - Why do images look different in web browsers than they do in Photoshop?
A - Photoshop reads the standard working space profile embedded in images, then converts from this profile to the monitor profile for accurate display.
Some browser applications read neither the standard working space profile nor the monitor profile, therefore they only benefit from the monitor calibration and not the profile.
If the application does not use an ICC profile, then images may look different than they do in Photoshop or other applications that do use ICC profiles.