Version numbers, platform details, model information, etc. There’s quite a bit of information packed into those strings (along with a fair number of lies). While a recent version of Edge identifies itself as: User-Agent: Mozilla/5.0 (Windows NT 10.0 Win64 圆4)ĪppleWebKit/537.36 (KHTML, like Gecko) Chrome/.79
Mac users vs windows users percentage ch mac os#
User agent in order to bypass misguided server-side heuristics, on the other.įor example, a recent version of Chrome on iOS identifies itself as: User-Agent: Mozilla/5.0 (iPhone CPU iPhone OS 12_0 like Mac OS X) In practice, however, this header’s value exposes far more information about the user’sĭevice than seems appropriate as a default, on the one hand, and intentionally obscures the true Would give servers the ability to perform content negotiation, sending down exactly those bits thatīest represent the requested resource in a given user agent, optimizing both bandwidth and userĮxperience. Header field along with each request (defined in Section 5.5.3 of ). Today, user agents generally identify themselves to servers by sending a User-Agent HTTP request
3.6 The 'Sec-CH-UA-Mobile' Header Field.3.5 The 'Sec-CH-UA-Full-Version-List' Header Field.3.4 The 'Sec-CH-UA-Full-Version' Header Field.3.3 The 'Sec-CH-UA-Bitness' Header Field.1.2.9.3 Blocking known bots and crawlers.1.2.9.1 Spam filtering and bot detection.1.2.5 Download of appropriate binary executables.1.2.3.6 Browser and OS specific experiments.
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