User-Agent Parser

Good to know

• Every parser of this kind is a pile of ordered guesses, because the strings were built to be mistaken for each other: Edge claims to be Chrome, Chrome claims to be Safari, and all of them claim to be Mozilla.
• Treat the result as a hint, never as a gate. Feature detection answers "can this browser do it"; a user-agent string only answers "what does it call itself".
• Browsers are actively removing detail from these strings. Client hints are the replacement, and they are sent only when the server asks for them.
• The parsing happens in your browser. Nothing you paste is sent to the server or stored anywhere.