Mozilla still hasn't figured out that they are synonymous with Firefox and until that happens you can expect the marketshare to further deplete. Meanwhile, Chrome gain little by little until Mozilla will be utterly irrelevant, which is a huge pity because we really need an independent browser.

I'm still writing this using Firefox but Chrome is now also running all the time on this machine because of one of my private projects which requires web midi (and which, according to Mozilla can not be implemented safely, though Chrome is existence proof that this is nonsense).