User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

first seen 2026-07-10 21:39 · last seen 2026-09-08 14:28 · JSON

Distinct clients per day (last 30 days, peak 2/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 135.0
Operating systemmacOS 10.15
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
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.9
t13d251100_b78ed14e2fd0_ab7e3b40a6771

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.8
ge20nn09enus_f2b6d441eea8_000000000000_0000000000001
ge11nr050000_57c5e92682a8_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:256|m,p,a,s8
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:03
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:03
4:51+13:0:1460:mss*44,13:mss,sok,ts,nop,ws:df,id+:01
6:52+12:0:1432:65535,6:mss,sok,ts,nop,ws:flow:01
4:52+12:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01
4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_76
64240_2-4-8-1-3_1460_131
65535_2-4-8-1-3_1432_61
65535_2-1-3-1-1-8-4-0-0_1460_61
64240_2-4-8-1-3_1460_71

Country

fingerprintco-occurrences
SE · Sweden3
FI · Finland3
US · United States2
ID · Indonesia1
VN · Vietnam1

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH3
AS214379 · South Park Networks LLC3
AS14061 · DigitalOcean, LLC1
AS14956 · RouterHosting LLC1
AS18403 · FPT Telecom Company1
AS23700 · Linknet-Fastnet ASN1