I have access to browser stats for a b2b saas. The majority of our customers use chrome for the app. Approx 70% chrome, 28% chromium, 2% safari (almost entirely mobile). NB: we discourage mobile or you'd see more ios; the main site is approx 50% safari (of that, > 95% mobile).
Last time I looked, only one person had used firefox in the trailing 3 months.
