So far .. so good .. I like some color in my tabs and it would seem that most of the add-ons for Firefox have been broken lately. Not sure why. This add-on would be WONDERFUL if it had a few choices of pastels in it. I would pay for a GOOD add-on like this that works. The 2 pastels are nice though. Better than no color but would love to see a few choices. I thank the writer of this code because I know how much time it takes to create stuff and debug it. (I am a retired network engineer). I suggest options and then make this donationware... THANK