Why does my user agent mention Mozilla when I use Chrome?

Historical compatibility. Nearly every browser starts its string with 'Mozilla/5.0' so old website checks don't break — the real browser name appears later in the string.

Can websites identify me from my user agent?

Not on its own — thousands of people share your exact string. Combined with other signals it contributes to fingerprinting, which is why browsers have been freezing its detail.

Can I change my user agent?

Yes. Browser devtools can override it per tab (in Chrome: DevTools → Network conditions), and extensions can switch it globally. Sites may then serve you different layouts.

What's My User Agent

Your user agent string is shown below, already broken down into browser, version, and OS.

User Agent

Browser, OS, device and engine from your current session

🌐

Browser

Unknown Browser Unknown

💻

Unknown OS Unknown

📱

Device

desktop

⚙️

Engine

Unknown

Raw User Agent String

What a user agent is used for

Your browser sends this string with every request so sites can adapt to your browser and device. Support teams ask for it to reproduce bugs — copy it from the panel above and paste it into your ticket.

FAQ

Why does my user agent mention Mozilla when I use Chrome?: Historical compatibility. Nearly every browser starts its string with 'Mozilla/5.0' so old website checks don't break — the real browser name appears later in the string.
Can websites identify me from my user agent?: Not on its own — thousands of people share your exact string. Combined with other signals it contributes to fingerprinting, which is why browsers have been freezing its detail.
Can I change my user agent?: Yes. Browser devtools can override it per tab (in Chrome: DevTools → Network conditions), and extensions can switch it globally. Sites may then serve you different layouts.