That's pretty much the effect I'm seeing. If it looks good in PS, it looks oversaturated elsewhere. If it looks good elsewhere, it looks badly desaturated in PS. And I'm not sure which one is the 'correct' version.
Firefox (with the full colour management option turned on) is supposed to be colour-aware, so that it doesn't give these discrepancies. But it still does.
I'm out of my depth here. However, this color-saturation mismatch between Photoshop and various internet browsers, as viewed on my calibrated monitor, became significantly noticeable only after I upgraded my monitor to the current high-resolution, wide color gamut, NEC model, which claims to be able to display the full gamut of Adobe RGB.
The impression I get is that there are both advantages and disadvantages to a wide-gamut monitor, the disadvantage being that all un-managed software will produce colours that are very visibly over-saturated.
The benefits are, when I proof images for printing on my Epson 7600, the proof colors, contrast and vibrancy that I see on my monitor need far less adjustment than they did on my previous monitors.
On my previous monitors, which had a display gamut probably no wider than that of sRGB, as soon as I hit 'proof colors' in Photoshop, the entire image would loose contrast and vibrancy, and would require an increased adjustment of saturation and contrast until the image gained the appearance it had before I hit 'proof colors'. The color profiles I use with my Epson 7600 are those created by Bill Atkinson many years ago, and I process my images for printing using the ProPhoto RGB color space.
The following site might shed some light on the issue.
http://www.tedsimages.com/text/links5.htmOr, perhaps Andrew Rodney would like to chime in.