This is an update on previous post. The problem I noted occurs with other appearance addons not just this one. Seems it might be a TB 8 problem and not with this addon. Using the ugly default scheme everything is normal. Not sure what the problem is. The default scheme is so ugly I need to replace it.
I like the looks of it. It is really neat. And Yes, I would love to use it. I am 71 yrs. young, and so enjoy the colorful ones. Love you having the neatest ones on Mozilla and Facebook. Very cool! Thanks Barb Bailey