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WhatsApp may expose the OS you use to run it – which could expose you to crooks
(www.theregister.com)
Icon base by Lorc under CC BY 3.0 with modifications to add a gradient
That’s also important information for targeting vulnerabilities. If there’s no reason to share that info, it should not be sharing it.
99% of browsers and their forks also expose your real OS via javascript (navigator.platform
), even on Tor Browser. Some in the privacy community say this information is actually worthless (it could be lying), but I don't know for sure.