Rated 5 out of 5 stars

Also in my Firefox 3.5.6 the "browse" button is not responding.
But can I put it in my self? is this the good path statement?
file:///windows/System32/spool/drivers/color/Spyder2express.icc

This review is for a previous version of the add-on (0.5.1). 

Sorry for the late response

This should be fixed in version 0.5.2. If you have any further problems you can fill out a bug report here: http://github.com/SeanHayes/firefox-color-management-add-on/issues

Also, I think C:\Windows\System32\spool\drivers\color\Spyder2express.icc should work. That's an interesting question though. Could you also try file:///C:\Windows\System32\spool\drivers\color\Spyder2express.icc and let me know if either one does or doesn't work? If you could it would be a big help.