User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

first seen 2026-06-12 09:50 · last seen 2026-08-02 11:38 · JSON

Decomposed attributes

Browser / clientFirefox 140.0
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
t13d1715h2_5b57614c22b0_a54fffd0eb6118
q13d0314h3_55b375c5d22e_61e396c58b1f Match?Exact match in Thumbprint's published controlled catalog captures: firefox 132.0, firefox-esr 140.11.0esr, firefox-esr 140.14.0esr, +11 more.The fingerprint page shows the full measured match list. More on the catalog.6
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.5
t12i130500_2d7513195f68_e51b7354d87f1
t12d130600_2d7513195f68_e51b7354d87f1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12enus_a72b71f519fc_000000000000_0000000000005
ge20nn12enus_a72b71f519fc_000000000000_0000000000004
ge20nr11enus_187a9385d229_000000000000_0000000000004
ge20nr10engb_b3034183f430_000000000000_0000000000004
ge20nn13enus_7e820a765fe5_000000000000_0000000000003
ge30nr11engb_c87d53636918_000000000000_0000000000003
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.2
ge30nr09engb_a060b6642c5e_000000000000_0000000000002
ge20nr14enus_f17998ff6631_000000000000_0000000000001
ge20nn14enus_f17998ff6631_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.8
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.6
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s2
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s2
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
6:44+20:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:06
6:49+15:0:1440:32768,10:mss,nop,ws,sok,ts:flow:04
4:51+13:0:1460:mss*29,9:mss,nop,ws:df,id+:02
6:59+5:0:1440:65535,9:mss,sok,ts,nop,ws:flow:02
6:48+16:0:8940:mss*7,12:mss,sok,ts,nop,ws:ecn,flow:02
4:51+13:0:1276:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:02
4:53+11:0:1400:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:02
6:48+16:0:1440:mss*45,11:mss,sok,ts,nop,ws:flow:01
6:47+17:0:1440:32768,10:mss,nop,ws,sok,ts:flow:01
6:47+17:0:8940:mss*7,12:mss,sok,ts,nop,ws:ecn,flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_76
32768_2-1-3-4-8_1440_106
62580_2-4-8-1-3_8940_123
65535_2-4-8-1-3_1440_92
65535_2-1-3-1-1-8-4-0-0_1276_62
65535_2-1-3-1-1-8-4-0-0_1400_62
64800_2-4-8-1-3_1440_111
65535_2-1-3-1-1-8-4-0-0_1380_61

QUIC transport params

fingerprintco-occurrences
q12_022106b74856 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.6

Country

fingerprintco-occurrences
IN · India11
NL · Netherlands6
CH · Switzerland6
SE · Sweden3
DE · Germany2
US · United States2
NO · Norway1

Network (ASN)

fingerprintco-occurrences
AS53667 · FranTech Solutions6
AS215125 · Church of Cyberology6
AS24560 · Bharti Airtel Ltd., Telemedia Services6
AS45609 · Bharti Airtel Ltd. AS for GPRS Service5
AS214503 · QuxLabs AB3
AS60729 · Stiftung Erneuerbare Freiheit2
AS6939 · Hurricane Electric LLC2
AS56655 · Gigahost AS1

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).

fingerprintlinked observations
q13d0314h3_55b375c5d22e_61e396c58b1f4
t13d1717h2_5b57614c22b0_3cbfd9057e0d4