Each detail alone is common. Together they are close to unique: the exact browser version, the time zone, the list of fonts, how the graphics card draws a test image. A site can recognise the same browser again without any cookie.
A proxy changes the IP address and nothing else, so two accounts opened from one browser through two proxies still share a fingerprint. Keeping accounts apart takes both: a separate fingerprint and a separate address for each.
Fingerprints are also why two profiles in ordinary Chrome are not truly separate. They hold different cookies, but they report the same machine. Sites that link accounts look for exactly that: different logins, one device.
Questions about browser fingerprint
Does private browsing change my fingerprint?
No. A private window clears cookies when it closes, but the screen, fonts and graphics card it reports are the same as in a normal window.
Can a proxy change my fingerprint?
No. A proxy changes the IP address only. Fingerprints are changed by the browser, which is what an antidetect browser is for.
Related terms
- Antidetect browser
- An antidetect browser runs many separate browser profiles, each with its own fingerprint, cookies and proxy, so they look like different people.
- TLS fingerprint
- A TLS fingerprint is the pattern in how a program opens an encrypted connection. It reveals whether the visitor is a browser or a script.
- User agent
- A user agent is a line of text a browser or program sends with every request to say what it is, such as Chrome on Windows.
- WebRTC leak
- A WebRTC leak is when a browser's video-call feature reveals your real IP address to a website even though you are using a proxy.
Read next: What is an antidetect browser?