You have to be reasonably active to bother with installing the app. Browsers are more popular with "lurkers" as they don't require the commitment of learning a different system and chewing up precious storage on their device.Seems like the mobile devices would be a whole lot higher.
The Mozilla information usually includes the OS. For Chrome you would have to dig a bit deeper. There are ways of telling, but they require probing much deeper than the UA string. The theory is that web browsers should make the web OS agnostic.Chrome on a desktop here! Can you tell what OS is being used?
If only they could stem the tide of vulnerabilities with Chrome. January and February combined for over 50 issues with compromising bugs of varying severity. Chrome is the only thing keeping Adobe, Cisco and Microsoft from owning all the worst code.Chrome is the only way to go, I like it more than Firefox. In the 2000s era Firefox was great, after 2010 Chrome really took off, its fast, slick, well maintained and clean.