User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:155.0) Gecko/20100101 Firefox/155.0

first seen 2026-09-04 07:40 · last seen 2026-10-30 06:51 · 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 155.0
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
t13d1514h2_8daaf6152771_53a6d0ab1c425
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.3
t13d0917h2_f91f431d341e_3cbfd9057e0d3
t13d1515h2_8daaf6152771_a54fffd0eb613
t13d1517h2_8daaf6152771_e6dcd7ae0a9e Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.3
q13d0315h3_55b375c5d22e_dc5437974b47 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +25 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d0916h2_f91f431d341e_0c27189014cf2
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn11ruru_3901d4197baf_000000000000_0000000000005
ge20nr11enus_187a9385d229_000000000000_0000000000004
ge20nr12enus_a72b71f519fc_000000000000_0000000000004
ge20nr12enus_979a40433f82_000000000000_0000000000004
ge20nr13enus_016d87568c43_000000000000_0000000000001
ge20nr11enus_3901d4197baf_000000000000_0000000000001
ge30nn10enus_9fcbd3f1e2d6_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +24 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge20nn09enus_bfc092dff6c6_000000000000_0000000000001
ge30nr10engb_9fcbd3f1e2d6_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.5
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 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog.4
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, +12 more.The fingerprint page shows the full measured match list. More on the catalog.2
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.2
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|15:0:0:42|m,p,a,s1
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|5:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1330:mss*49,10:mss,sok,ts,nop,ws:df,id+:05
4:242+13:0:1420:mss*42,8:mss,nop,ws,sok,eol+1:df,id+:04
4:49+15:0:1330:mss*49,10:mss,sok,ts,nop,ws:df,id+:03
6:54+10:0:1336:65535,8:mss,sok,ts,nop,ws:flow:03
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:241+14:0:1420:mss*42,8:mss,nop,ws,sok,eol+1:df,id+:01
4:47+17:0:1420:65535,6:mss,sok,ts,nop,ws:df,id+:01
6:54+10:0:1439:65535,10:mss,sok,ts,nop,ws:flow:01
4:48+16:0:1440:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:01

TCP SYN (JA4T)

fingerprintco-occurrences
65170_2-4-8-1-3_1330_108
59640_2-1-3-4-0-0_1420_85
65535_2-4-8-1-3_1336_83
64240_2-4-8-1-3_1460_71
65535_2-1-3-1-1-8-4-0-0_1440_61
65535_2-4-8-1-3_1420_61
65535_2-4-8-1-3_1439_101

QUIC transport params

fingerprintco-occurrences
q13_c3e7031b10dc Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 156.0, firefox 155.0, +5 more.The fingerprint page shows the full measured match list. More on the catalog.2

Country

fingerprintco-occurrences
MX · Mexico8
FR · France5
RU · Russia4
DE · Germany1
CN · China1
ES · Spain1
FI · Finland1
SA · Saudi Arabia1

Network (ASN)

fingerprintco-occurrences
AS396356 · Latitude.sh8
AS15557 · Societe Francaise Du Radiotelephone - SFR SA5
AS12389 · PJSC Rostelecom4
AS50053 · VDSka hosting1
AS25019 · Saudi Telecom Company JSC1
AS24400 · Shanghai Mobile Communications Co.,Ltd.1
AS51202 · NUXOA GmbH1
AS12334 · R Cable y Telecable Telecomunicaciones, S.A.U.1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1
11ec,001d,0017,0018,0019,0100,01011