Proxy Exit IPs and Browser Fingerprints
Changing the network exit changes one signal. Websites can still observe browser characteristics and account state that the proxy does not replace.
A proxy can change the address shown by an IP-check page while a website still recognizes the browser. The browser continues to send characteristics such as language, time zone, supported features, and display properties.
Combining those observations can help distinguish one browser from others, a practice MDN describes as fingerprinting. The proxy does not automatically replace those characteristics.
Cookies and account logins provide additional links between visits. A site recognizing an existing session has not necessarily discovered the old IP behind the proxy.
For an approved network exit, verify the application's route. For reduced browser tracking, examine the browser's supported privacy protections and retained state. The W3C fingerprinting guidance treats mitigation as a broader browser and web-platform problem; random preference changes offer no meaningful anonymity guarantee.
A proxy remains useful for selecting an exit or reaching an authorized service. That routing result alone cannot establish that visits are unlinkable.