User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:144.0) Gecko/20100101 Firefox/144.0

first seen 2026-08-17 18:19 · last seen 2026-10-29 12:31 · JSON

Last 7 days (2 observations)

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 144.0
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.6
t13d1717h2_5b57614c22b0_05692a3430783

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.9

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s6
2:0;4:131072;5:16384;6:16384|12451842|0|m,a,s,p3

TCP SYN (p0f)

fingerprintco-occurrences
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:03
4:45+19:0:1360:mss*48,7:mss,sok,ts,nop,ws:df,id+:03
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:02
4:50+14:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:01

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_75
65280_2-4-8-1-3_1360_73
65535_2-1-3-1-1-8-4-0-0_1380_61

Country

fingerprintco-occurrences
DE · Germany3
FI · Finland3
SE · Sweden2
TR · Turkey1

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH6
AS214379 · South Park Networks LLC2
AS9121 · Turk Telekomunikasyon Anonim Sirketi1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01013