Parser User-agent · Guía
Detecting Browser and OS from a User-Agent
Browser and OS are the fields people most want from a UA string. Here is how to read them and where caution is due.
Read browser and OS
A parser maps the UA to a browser name and version and an OS family. For analytics and support, that is usually enough to understand the client.
Do not gate features on it
Because UA strings can mislead, avoid using them to enable or block functionality. Feature detection is more reliable than UA sniffing for deciding what a client supports.
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