Rated 5 out of 5 stars
i got a reply from the developer team.
Just released an update. Please download at http://www.binaryturf.com/free-software/colorfultabs-for-firefox/.
It fixed the text label and makes the blinking a preference which is disabled by default.
So it will fix our problem about the current update that make some WHITE Font and uncomfortable for user.
Really like the support developer team and this addon. Must try it :)