Like a lot of features that were dropped, because of the lack of time before the release of Firefox 3.0, color management was off by default. The big problem was that it was too slow. Now for the Firefox 3.1 release it is stable and fast enough and will be enabled. It is as good as finished and is already available in the nightly's releases and will be available in the next development release (Firefox 3.1 beta 1), currently scheduled for late October.
Like I said it is turned off in Firefox 3.0. That means you can turn it on yourself. To do that you only have to go to 'about:config'. There you need to search after 'gfx.color_management.enabled' and set it to 'true'
To explain where it is really about, you need to know that a RGB value does not represent a color alone. You need to see them as coordinates in a color space that contains the actual colors. Usually a display offer that information through a file, the ICC color profile. Also JPG and PNG images can contain ICC profiles to specify its color space. That way a pixel can get represented on your screen like it really looks. That's how it should be, but before the implementation of color management it just used the standard sRGB to find the color.
The browser (together with Safari the only browser) will look to the profile given by the computer and use the given data in the files to represent colors of images more accurate. Still it is not enabled for all pictures. To hit the performance not to much, it is only active for images tagged with ICC profiles. The performance overhead is then 1%. If activated for everything the overhead is 4%. The implementation for everything is available, but not active because of the performance. Probably in the near future it will get enabled, when it gets faster. To enable it yourself (in the nighlty's) you just need to go too 'about:config' and search after 'gfx.color_management.enabled'. '0' means no color management, '1' is full color management, and '2' (the default) will give color management for tagged-only correction (for technical reasons, you’ll need to restart your browser for this setting to take effect).
For more information about the color management in Firefox you can read:
http://bholley.wordpress.com/2008/09/12/so-many-colors/
Also the following blog gives some more details:
http://www.dria.org/wordpress/archives/2008/04/29/633/
Sunday, September 28, 2008
Color management turned on Firefox 3.1 nightly's
Labels:
color management,
firefox,
firefox 3.1,
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