TLS ClientHello (JA4)

q13d0315h3_55b375c5d22e_dc5437974b47

first seen 2026-06-11 08:56 · last seen 2026-10-31 00:10 · JSON

Matches controlled captures

Known clients driven through this site's own edge produced this exact fingerprint — measured truth, not inference. catalog →

firefox-esr 153.5.1esr · Debian 12 · container — 1 session, last 2026-10-27 23:05 controlled
firefox 158.0.1 · Windows 10.0.26100.33650 · via geckodriver · ci — 1 session, last 2026-10-26 20:09 controlled
firefox-esr 153.5.0esr · Debian 12 · container — 1 session, last 2026-10-20 23:04 controlled
firefox 157.0.1 · Windows 10.0.26100.33438 · via geckodriver · ci — 1 session, last 2026-10-19 20:09 controlled
firefox 158.0 · Ubuntu 24.04 · via geckodriver · ci — 1 session, last 2026-10-19 20:09 controlled
firefox 157.0.1 · macOS 26.6.2 · via geckodriver · ci — 1 session, last 2026-10-19 20:08 controlled
firefox 157.0 · Ubuntu 24.04 · via playwright · container — 2 sessions, last 2026-10-14 20:20 controlled
firefox 157.0 · Ubuntu 24.04 · via geckodriver · ci — 1 session, last 2026-10-13 01:46 controlled
firefox 155.0.1 · macOS 26.6.2 · via geckodriver · ci — 3 sessions, last 2026-10-06 03:14 controlled
firefox 155.0.1 · macOS 15.7.9 · via geckodriver · ci — 3 sessions, last 2026-10-06 03:13 controlled

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

q13d0315h3_55b375c5d22e_dc5437974b47

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Chrome 149.0.0.0

TLS extensions or signature algorithms differ from every measured Chrome capture

The cipher suites match Chrome, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Claimed version	149.0.0.0
Measured versions	149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 153.0.8010.47, 149.0.7827.54, 155.0.8059.79, 153.0.8010.36, 151.0.7922.170, 156.0.8078.48, 152.0.7977.82, 152.0.7977.65, 156.0.8078.73, 155.0.8059.84, 150.0.7871.129, 155.0.8059.40, 154.0.8037.58, 151.0.7922.173, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 154.0.8037.97, 149.0.7827.155, 151.0.7922.109, 152.0.7977.64, 149.0.7827.200, 151.0.7922.174, 153.0.8010.53, 149.0.7827.114, 154.0.8037.57, 149.0.7827.201, 150.0.7871.187, 152.0.7977.83, 153.0.8010.52, 150.0.7871.114, 155.0.8059.39, 150.0.7871.115, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 154.0.8037.92, 156.0.8078.47, 149.0.7827.102, 151.0.7922.108, 150.0.7871.125, 150.0.7871.46, 148.0.7778.179
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-08-22

q13d0315h3_55b375c5d22e_dc5437974b47

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) …

User-Agent claims Safari 26.1

TLS extensions or signature algorithms differ from every measured Safari capture

The cipher suites match Safari, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.

Full User-Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.1 Safari/605.1.15
Claimed version	26.1
Measured versions	26.5, 26.5.2, 26.6.1, 26.4, 26.6.2
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-10-03

q13d0315h3_55b375c5d22e_dc5437974b47

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Chrome 150.0.0.0

TLS extensions or signature algorithms differ from every measured Chrome capture

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36
Claimed version	150.0.0.0
Measured versions	149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 153.0.8010.47, 149.0.7827.54, 155.0.8059.79, 153.0.8010.36, 151.0.7922.170, 156.0.8078.48, 152.0.7977.82, 152.0.7977.65, 156.0.8078.73, 155.0.8059.84, 150.0.7871.129, 155.0.8059.40, 154.0.8037.58, 151.0.7922.173, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 154.0.8037.97, 149.0.7827.155, 151.0.7922.109, 152.0.7977.64, 149.0.7827.200, 151.0.7922.174, 153.0.8010.53, 149.0.7827.114, 154.0.8037.57, 149.0.7827.201, 150.0.7871.187, 152.0.7977.83, 153.0.8010.52, 150.0.7871.114, 155.0.8059.39, 150.0.7871.115, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 154.0.8037.92, 156.0.8078.47, 149.0.7827.102, 151.0.7922.108, 150.0.7871.125, 150.0.7871.46, 148.0.7778.179
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-08-27

q13d0315h3_55b375c5d22e_dc5437974b47

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Chrome 152.0.0.0

TLS extensions or signature algorithms differ from every measured Chrome capture

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36
Claimed version	152.0.0.0
Measured versions	149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 153.0.8010.47, 149.0.7827.54, 155.0.8059.79, 153.0.8010.36, 151.0.7922.170, 156.0.8078.48, 152.0.7977.82, 152.0.7977.65, 156.0.8078.73, 155.0.8059.84, 150.0.7871.129, 155.0.8059.40, 154.0.8037.58, 151.0.7922.173, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 154.0.8037.97, 149.0.7827.155, 151.0.7922.109, 152.0.7977.64, 149.0.7827.200, 151.0.7922.174, 153.0.8010.53, 149.0.7827.114, 154.0.8037.57, 149.0.7827.201, 150.0.7871.187, 152.0.7977.83, 153.0.8010.52, 150.0.7871.114, 155.0.8059.39, 150.0.7871.115, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 154.0.8037.92, 156.0.8078.47, 149.0.7827.102, 151.0.7922.108, 150.0.7871.125, 150.0.7871.46, 148.0.7778.179
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-10-03

Last 7 days (31 observations)

Distinct clients per day (last 30 days, peak 4/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

Protocol	`q (QUIC)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`3`
Extension count	`15`
ALPN	`h3`
Ciphers	`1301, 1302, 1303`
Extensions	`0005, 000a, 000d, 0017, 001b, 001c, 0022, 002b, 002d, 0033, 0039, fe0d, ff01`
Signature algorithms	`0403, 0503, 0603, 0203, 0804, 0805, 0806, 0401, 0501, 0601, 0201`
JA4_r	`q13d0315h3_1301,1302,1303_0005,000a,000d,0017,001b,001c,0022,002b,002d,0033,0039,fe0d,ff01_0403,0503,0603,0203,0804,0805,0806,0401,0501,0601,0201`
JA4_o (sample)	`q13d0315h3_85902d7a8465_e23ec8fa257c`
JA4_ro (sample)	`q13d0315h3_1301,1303,1302_0022,0005,000d,0010,0033,002b,0017,ff01,001c,002d,000a,0000,001b,0039,fe0d_0403,0503,0603,0203,0804,0805,0806,0401,0501,0601,0201`

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.

HTTP request (JA4H)

fingerprint	co-occurrences
`ge30nr09enus_a060b6642c5e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +28 more.The fingerprint page shows the full measured match list. More on the catalog.	61
`ge30nr11enus_c87d53636918_000000000000_000000000000`	32
`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.	23
`ge30nr10enus_9fcbd3f1e2d6_000000000000_000000000000`	23
`ge30nr10enus_d6360b5be5ba_000000000000_000000000000`	21
`ge30nn11enus_c87d53636918_000000000000_000000000000`	18
`ge30nr11enus_c601de5755fc_000000000000_000000000000`	17
`ge30nr11enus_7eaa533deebc_000000000000_000000000000`	14
`ge30nr12enus_35ca41c56357_000000000000_000000000000`	13
`ge30nr13enus_b80bb85c3fa9_000000000000_000000000000`	10

QUIC transport params

fingerprint	co-occurrences
`q12_022106b74856` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +29 more.The fingerprint page shows the full measured match list. More on the catalog.	394
`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.	144
`q13_29150affcbde` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 151.0.3, firefox 132.0, firefox 151.0.4, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	20
`q13_dd2837bc12e2`	5

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0`	80
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0`	79
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:157.0) Gecko/20100101 Firefox/157.0`	39
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.0`	35
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:153.0) Gecko/20100101 Firefox/153.0`	29
`Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0`	27
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0`	24
`Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:155.0) Gecko/20100101 Firefox/155.0`	20
`Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0`	16
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:158.0) Gecko/20100101 Firefox/158.0`	13

Country

fingerprint	co-occurrences
`US` · United States	80
`DE` · Germany	47
`FR` · France	41
`SE` · Sweden	29
`ES` · Spain	29
`NL` · Netherlands	26
`AU` · Australia	23
`IT` · Italy	23
`CA` · Canada	22
`RU` · Russia	21

Network (ASN)

fingerprint	co-occurrences
`AS3352` · TELEFONICA DE ESPANA S.A.U.	27
`AS15557` · Societe Francaise Du Radiotelephone - SFR SA	17
`AS8473` · Bahnhof AB	14
`AS12322` · Free SAS	14
`AS23889` · Mauritius Telecom Ltd	14
`AS7018` · AT&T Enterprises, LLC	13
`AS701` · Verizon Business	10
`AS25400` · Telia Norge AS	10
`AS3301` · Telia Company AB	10
`AS3320` · Deutsche Telekom AG	10

TLS supported groups

fingerprint	co-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.	56

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).

fingerprint	linked observations
`t13d1617h2_86a278354501_3cbfd9057e0d`	62
`t13d1616h2_86a278354501_0c27189014cf`	54
`t13d1516h2_8daaf6152771_0c27189014cf`	35
`t13d1517h2_8daaf6152771_3cbfd9057e0d`	25
`t13d1616h2_86a278354501_eeeea6562960`	17
`t13d1717h2_5b57614c22b0_3cbfd9057e0d`	5
`t13d1716h2_5b57614c22b0_0c27189014cf`	4
`t13d0916h2_f91f431d341e_0c27189014cf`	4
`t13d1615h2_86a278354501_a54fffd0eb61`	4
`t13d1613h2_86a278354501_748f4c70de1c`	4