User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0

first seen 2026-06-28 15:16 · last seen 2026-10-29 08:59 · JSON

Last 7 days (2 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 133.0
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
t13d1716h2_5b57614c22b0_eeeea6562960 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 132.0, firefox 134.0.The fingerprint page shows the full measured match list. More on the catalog.15
t13d301200_1d37bd780c83_0b298858d6c13
t13d201100_2b729b4bf6f3_36bf25f296df1
t13d311100_e8f1e7e78f70_d41ae481755e Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.1, rust-hyper 1.12.0, rust-hyper 1.11.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d3013h1_1d37bd780c83_ecd0401ec68b1

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.13
ge11nr06enus_09fb680966d5_000000000000_0000000000003
ge20nr10enus_09adfbf0ecd4_000000000000_0000000000002
ge11nn020000_3ed38b250d3d_000000000000_0000000000001
ge20nn04enus_ded3c6d8f0eb_000000000000_0000000000001
ge11nr07enus_1ce6da179c54_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:256|m,p,a,s11
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.2
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s2
1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:02
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:02
4:50+14:0:1460:32768,10:mss,nop,ws,sok,ts::02
4:56+8:0:1460:mss*22,9:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1460:32768,10:mss,nop,ws,sok,ts::02
4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
6:45+19:0:1440:65535,8:mss,nop,ws,nop,nop,sok:flow:01
6:53+11:0:1440:65535,8:mss,nop,ws,nop,nop,sok:flow:01
4:55+9:0:1340:27520,7:mss,sok,ts,nop,ws::01
4:52+12:0:1340:27520,7:mss,sok,ts,nop,ws::01

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_74
32768_2-1-3-4-8_1460_104
32120_2-4-8-1-3_1460_93
27520_2-4-8-1-3_1340_72
64240_2-4-8-1-3_1460_71
65535_2-1-3-1-1-4_1440_81
65535_2-4-8-1-3_1412_61
64240_2-4-8-1-3_1460_91
65535_2-4-8-1-3_1452_61
43200_2-4-8-1-3_1440_111

Country

fingerprintco-occurrences
NL · Netherlands8
FI · Finland3
US · United States2
SE · Sweden2
TH · Thailand2
DE · Germany1
BR · Brazil1
FR · France1
TR · Turkey1

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology4
AS48090 · TECHOFF SRV LIMITED3
AS24940 · Hetzner Online GmbH3
AS212238 · Datacamp Limited2
AS214379 · South Park Networks LLC2
AS197170 · TechTies Inc.1
AS197540 · netcup GmbH1
AS28573 · Claro NXT Telecomunicacoes Ltda1
AS3215 · Orange S.A.1
AS9121 · Turk Telekomunikasyon Anonim Sirketi1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01012
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.1