first seen 2026-10-31 21:12 · last seen 2026-10-31 21:37 · JSON
Last 7 days (4 observations)
Decomposed attributes
IP version
4
Initial TTL
110+18
Options length
0
MSS
1240
Window size
mss*52
Window scale
8
Options layout
mss,nop,ws,nop,nop,sok
Quirks
df,id+
Payload class
0
Co-observed signals
Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.
TLS ClientHello (JA4)
fingerprint
co-occurrences
t13d1517h2_8daaf6152771_3cbfd9057e0dMatch?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.
11ec,001d,0017,0018,0019Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.
4
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).