How platforms link accounts beyond the browser fingerprint

An antidetect browser solves one layer of the detection problem. Teams that get banned despite a clean fingerprint are usually getting caught somewhere else in the stack.

Proxy quality and reuse

The single most common cause of linked accounts isn't the browser — it's proxy reuse. Two profiles sharing an IP, or using IPs from the same /24 subnet, or using a datacenter IP range a platform has already flagged as proxy traffic, links them regardless of how clean the fingerprint is underneath.

TLS/JA3 fingerprinting

The TLS handshake itself — cipher suite order, extensions, elliptic curves offered — produces a fingerprint independent of anything in the browser's JavaScript environment. Two profiles running the same underlying browser engine with the same TLS stack can share a JA3 hash even with completely different canvas/WebGL spoofing on top.

Behavioral signals

Typing cadence, mouse movement patterns, session timing, and navigation sequences all feed modern anti-fraud models. A profile that logs in at exactly the same second every day, or that never scrolls before clicking, reads as automation regardless of what the fingerprint says.

Account-graph signals

Shared payment methods, shared phone numbers used for verification, referral links between "unrelated" accounts, and even writing-style similarity in support tickets all feed into graph-based detection that doesn't touch the browser layer at all.

What this means practically

• Pair every profile with a dedicated, clean proxy — not a shared pool
• Don't assume a passing CreepJS score means the account is safe; it only covers the browser layer
• Vary session timing and interaction patterns rather than scripting identical, repeated flows
• Keep payment and verification details fully separated per identity if the use case requires it