Quick question: how dose this detect?

[jimmywarting]

just wondering some basic stuff of how this work
Is it solo based on user agent string or dose it do some browser detection to avoid faking the user agent string somehow?
dose bowser have any advantages on running on the client side rather than on a backend and parsing the user agent string?

also dose this use any of this headers to do detection?

• sec-ch-ua
• sec-ch-ua-mobile
• sec-ch-ua-platform