Hmm, looked around and discovered from http://en.wikipedia.org/wiki/Color_management (nice basic overview about color management) and http://www.gballard.net/psd/go_live_page_profile/embeddedJPEGprofiles.html (detailed information and there you can control is your current web browser 'ICC color managed'):
..."Most web browsers ignore color profiles. Notable exceptions are Safari, starting with version 2.0, and Firefox starting with version 3.0. Although disabled by default in Firefox 3.0, users can enable ICC v2 and ICC v4 color management by using an add-on or setting the value "gfx.color_management.enabled" to "true" in Firefox 3's "about:config" file. Starting from Firefox 3.5 color management is enabled by default only for tagged images, although support is limited to ICC v2 profiles owing to a change in color management systems from 3.0."...
and more about browsers:
Chrome does'nt support color ICC profile and EXIF data. And so is with mighty Opera too?
but:
Next coming Internet Explorer 9 supports embedded ICC v2 or v4 color profiles
Whats happening in LINUX (and LINUX web browsers) world???
What we really need is calibration, image scanner needs that, printer needs that ... but at least my main monitor is calibrated with ICC profile correction.
And happily for everybody, new digital imaging programs contain somekind profile information (built in or plugins) about digital cameras and lenses!
__________________________
added later
OK! Everything above is little questionable, if looked from here (nice page, with some real world workaround hints) http://gearoracle.com/guides/web-browser-color-management-guide/
..."Limitations:
Firefox uses a color management engine called qcms and it supports only ICC v2 profiles. If your monitor profile is ICC v4, you’re out of luck, although this is easy to circumvent, as most monitor calibration packages offer options to choose the ICC profile version.
Apple Safari
Safari supports both v2 and v4 ICC profiles. Unfortunately, it has no control over color on other page elements. Tagged images look right, but every other page element has over-saturated colors on a wide gamut LCD.
[new] Google Chrome
Chrome also supports both v2 and v4 ICC profiles, at least on the Mac platform. Like Safari, all untagged images and page graphics are considered to be on monitor RGB, leading to over-saturated colors on wide gamut displays. I could not make profiles work on Chrome for Windows, even by applying a command line switch.
Microsoft Internet Explorer
Internet Explorer 9, currently in beta testing, is the first version to support color management. Like webKit-based browsers, untagged images and page elements are assumed to be on the full monitor gamut. All other Internet Explorer versions aren’t color managed.
Opera
Opera doesn’t support color management at all. ICC profiles embedded in images are ignored and the whole page is rendered on the monitor colorspace."...
..." Best practices and recommendations
Assume sRGB for untagged files and unsupported formats like GIF.
Work on a bigger color space, like AdobeRGB or ProPhotoRGB, but always convert to sRGB during export.
Always tag your JPG images. Use a larger colorspace, like AdobeRGB, only if your site’s audience uses high end monitors. Examples are a high end advertising photography website or a client area on your website where you can have control of your users’ display configurations.
PNG files are tagged by default on Photoshop, even though the program doesn’t allow us to select the “Embed color profile” option. If you don’t need any color profile tagging on your PNG files, try pngcrush to strip it from your files’ headers and make them a little smaller."...
Edited by dharma - 10/28/10 at 10:35am