User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0
first seen 2026-06-11 18:37 · last seen 2026-10-28 01:56 · JSON
Last 7 days (8 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 / client | Firefox 140.0 |
|---|---|
| Operating system | Windows 10.0 |
| Device class | desktop |
| Note | inferred 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)
| fingerprint | co-occurrences |
|---|---|
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. | 80 |
t13d1715h2_5b57614c22b0_a54fffd0eb61 | 52 |
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog. | 41 |
t13d1716h2_5b57614c22b0_0c27189014cf 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. | 16 |
t13d1714h2_5b57614c22b0_53a6d0ab1c42 | 6 |
t13d1717h1_5b57614c22b0_3cbfd9057e0d | 6 |
q13d0314h3_55b375c5d22e_61e396c58b1f Match?Exact match in Thumbprint's published controlled catalog captures: firefox 132.0, firefox-esr 140.11.0esr, firefox-esr 140.16.0esr, +12 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t13d1314h2_f57a46bbacb6_fb48f8b98a29 | 3 |
t13d2013h1_2b729b4bf6f3_e24568c0d440 | 3 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr14ruru_dfdfe003b035_000000000000_000000000000 | 41 |
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +27 more.The fingerprint page shows the full measured match list. More on the catalog. | 28 |
ge20nn12enus_a72b71f519fc_000000000000_000000000000 | 19 |
ge20nr11enus_187a9385d229_000000000000_000000000000 | 14 |
ge20nn10ruru_d353d425b0bb_000000000000_000000000000 | 14 |
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 |
ge20nr12enus_a4e537ffe33a_000000000000_000000000000 | 12 |
ge20nr11enus_3901d4197baf_000000000000_000000000000 | 9 |
ge20nr11enus_dff93ddcf3c8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 132.0, firefox 151.0.3, firefox 151.0.4, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
ge20nr13enus_47bedc02e943_000000000000_000000000000 | 6 |
HTTP/2 frames (Akamai)
| fingerprint | co-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. | 56 |
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. | 38 |
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. | 10 |
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. | 10 |
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s | 6 |
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s | 6 |
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:22|m,p,a,s | 4 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:42|m,p,a,s | 4 |
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s | 3 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:42|m,p,a,s | 3 |
TCP SYN (p0f)
TCP SYN (JA4T)
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. | 5 |
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. | 1 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 59 |
ID · Indonesia | 53 |
NL · Netherlands | 28 |
CA · Canada | 16 |
MD · Moldova | 13 |
DE · Germany | 12 |
BG · Bulgaria | 10 |
SE · Sweden | 5 |
FR · France | 5 |
MY · Malaysia | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS204770 · UAB "Cherry Servers" | 37 |
AS9657 · Melsa-i-net AS | 37 |
AS43289 · Trabia SRL | 13 |
AS4761 · INDOSAT Internet Network Provider | 11 |
AS50053 · VDSka hosting | 10 |
AS211507 · Julian Achter | 10 |
AS27284 · Fourplex Telecom LLC | 7 |
AS395965 · Carrytel | 7 |
AS216139 · Iron Hosting Centre LTD | 7 |
AS47674 · Net Solutions - Consultoria Em Tecnologias De Informacao, Sociedade Unipessoal LDA | 7 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
11ec,11eb,11ed,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.3, go-net/http 1.26.10.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
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. | 2 |
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 |
|---|---|
q13d0314h3_55b375c5d22e_61e396c58b1f | 3 |
t13d1717h2_5b57614c22b0_3cbfd9057e0d | 3 |
t13d1715h2_5b57614c22b0_a54fffd0eb61 | 2 |
q13d0313h3_55b375c5d22e_fc7519ff7bc2 | 2 |