User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.0

first seen 2026-06-21 21:06 · last seen 2026-09-16 00:41 · JSON

Last 7 days (12 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 152.0
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
q13d0315h3_55b375c5d22e_dc5437974b47 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +18 more.The fingerprint page shows the full measured match list. More on the catalog.35
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.32
t13d1616h2_86a278354501_0c27189014cf Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.14
t13d2610h2_6d1bcf7a4624_188c7f576dcd11
t13d1615h2_86a278354501_a54fffd0eb6111
t13d1614h2_86a278354501_53a6d0ab1c422
t13d260900_6d1bcf7a4624_188c7f576dcd1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr13enus_016d87568c43_000000000000_00000000000014
ge20nr13itit_016d87568c43_000000000000_00000000000011
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.7
ge20nr11enus_b58f2e363a6d_000000000000_0000000000005
ge20nr12enus_1204b4dfdccd_000000000000_0000000000004
ge20nr10enus_46e944d5de42_000000000000_0000000000004
ge20nr11enus_187a9385d229_000000000000_0000000000004
ge20nn030000_ff50983941c1_000000000000_0000000000004
ge30nn11enus_0c72cb6d0dd2_000000000000_0000000000003
ge30nr11enus_7eaa533deebc_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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.14
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.12
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:22|m,p,a,s6
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s3
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s3
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:42|m,p,a,s3
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|5:0:0:42|m,p,a,s2
4:32768;3:100;2:0|4128769|1:0:0:42|a,m,p,s2
1:65536;2:0;4:131072;5:16384|12517377|15:0:0:42|m,p,a,s2

TCP SYN (p0f)

fingerprintco-occurrences
6:242+13:0:1440:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:016
4:48+16:0:1452:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:013
4:52+12:0:1460:65535,6:mss,nop,ws,sok,ts:df,id+:011
4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:011
4:48+16:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:05
6:46+18:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:02
4:55+9:0:1460:mss*44,8:mss,sok,ts,nop,ws:df,id+:02
4:113+15:0:1360:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:02
4:56+8:0:1460:65535,6:mss,nop,ws,sok,ts:df,id+:01
4:55+9:0:1286:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1440_618
65535_2-1-3-1-1-8-4-0-0_1452_613
65535_2-1-3-4-8_1460_612
64860_2-4-8-1-3_1380_1011
65535_2-1-3-1-1-8-4-0-0_1460_66
64800_2-4-8-1-3_1440_72
64240_2-4-8-1-3_1460_82
65535_2-1-3-1-1-8-4-0-0_1360_62
65535_2-1-3-1-1-8-4-0-0_1286_61
65535_2-1-3-1-1-8-4-0-0_1300_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.33
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.2

Country

fingerprintco-occurrences
US · United States42
IT · Italy18
SG · Singapore15
CY · Cyprus12
AU · Australia6
AT · Austria4
FI · Finland3
DE · Germany2
RU · Russia1
IN · India1

Network (ASN)

fingerprintco-occurrences
AS7018 · AT&T Enterprises, LLC18
AS1267 · WIND TRE S.P.A.18
AS57169 · EDIS GmbH12
AS53813 · ZSCALER, INC.11
AS14618 · Amazon.com, Inc.5
AS20001 · Charter Communications Inc5
AS7224 · Amazon.com, Inc.5
AS38195 · Superloop4
AS9009 · M247 Europe SRL4
AS7922 · Comcast Cable Communications, LLC4

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
q13d0315h3_55b375c5d22e_dc5437974b4712
t13d1616h2_86a278354501_0c27189014cf6
t13d1617h2_86a278354501_3cbfd9057e0d4
t13d1614h2_86a278354501_53a6d0ab1c422