* Method 1: Install the Color Management add-on Once installed, enabling and disabling colour management is as simple as checking a checkbox and relaunching Firefox 3. The add-on, currently at v0.4, can be downloaded here (free registration required).
* Method 2: Manually edit the colour management setting This is easy even for the non-geeks in the crowd. The steps are:
1. Type about:config in Firefox 3's address bar and press Return. The configuration settings will appear.
2. In the Filter field, type gfx. The list of settings will shorten to show just those related to graphics, ie gfx.
3. If the Value for gfx.color_management.enabled is False, double-click anywhere on that line to toggle the setting to True.
4. Quit and relaunch Firefox 3 and you're in business. You can confirm that colour management is working by viewing the photos on this page. If all four quadrants of the first photo are a seamless match, then colour management in your copy of Firefox is up and running.