User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0

first seen 2026-06-16 23:12 · last seen 2026-09-12 18:39 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Browser / clientFirefox 143.0
Operating systemWindows 10.0
Device classdesktop
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

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)

fingerprintco-occurrences
t13d1516h3_8daaf6152771_d8a2da3f94cd2
t12d130600_2d7513195f68_e51b7354d87f1
t13d311000_e8f1e7e78f70_518fb456ca591

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.1
ge20nr13zhcn_50f953bbeac5_000000000000_0000000000001
ge11nr09enus_a1ca5f23d14f_000000000000_0000000000001
ge20nr12zhcn_ec42c49253c7_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1460:mss*20,10:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1460:mss*29,9:mss,nop,ws:df,id+:01
4:46+18:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_71

Country

fingerprintco-occurrences
US · United States2
CN · China2

Network (ASN)

fingerprintco-occurrences
AS17638 · ASN for TIANJIN Provincial Net of CT2
AS6939 · Hurricane Electric LLC1
AS396190 · Leaseweb USA, Inc.1