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nope, user agent sniffing is alive and well. Google is especially guilty, but lots of sites do it. Try changing your user agent and see how many things break.

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When I was working on mod_pagespeed I wrote some about how we decided to parse the UA: https://www.jefftk.com/p/why-parse-the-user-agent

(Summary: feature detection requires more round trips, and slows down pages.)

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