Hi,
Sorry, I don’t know if this is the right channel to do this, but I think I’ve found a bug. Something that I’ve noticed on Survey button that appear all the times that asked to rate an experiment (already happen with Min Vid, Page Shot and now with Tab Center). The color in the button survey request, is the same than the button color, this is a screen shot of bar for survey button.
This happen in Firefox Nightly and Firefox Beta.
Cheers,