Rated 4 out of 5 stars

..it were great. overwrites active tab color because the author doesn't understand specificity. putting !important behind every rule especially something as monstrous as this selector:
toolbox toolbar toolbarbutton:not(.plain)[type*="menu"]:not([open]):not([disabled]):not([checked="true"]) toolbarbutton:hover

makes it next to impossible for other Addons authors to style their controls. !important is just too heavy handed; specificity ftw.

If you actually have some kind of support request then just make it, no need to throw around insults like a child. Not that I'm inclined to honor a support request after that. Especially considering that in my experience in developing over a dozen themes, extensions authors often like to do really silly things and then complain that themes won't let them, or worse try to play override dominance. So I really don't have much sympathy at this point.