User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0
first seen 2026-07-23 14:07 · last seen 2026-10-31 12:48 · JSON
Last 7 days (88 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 153.0 |
|---|---|
| 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 |
|---|---|
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. | 136 |
q13d0315h3_55b375c5d22e_dc5437974b47 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. | 30 |
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. | 17 |
t13d1813h1_85036bcba153_d339722ba4af | 10 |
q13d0314h3_55b375c5d22e_1ecea7cb6ec1 | 7 |
t13d1515h2_8daaf6152771_a54fffd0eb61 | 6 |
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 22.23.1, +9 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1615h2_86a278354501_a54fffd0eb61 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr11enus_3901d4197baf_000000000000_000000000000 | 36 |
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, +28 more.The fingerprint page shows the full measured match list. More on the catalog. | 27 |
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. | 21 |
ge20nn11ruru_3901d4197baf_000000000000_000000000000 | 21 |
ge20nr10ruru_b3034183f430_000000000000_000000000000 | 16 |
ge20nn030000_ff50983941c1_000000000000_000000000000 | 8 |
ge30nr09ruru_a060b6642c5e_000000000000_000000000000 | 6 |
ge11nr11enus_110ea253938c_000000000000_000000000000 | 6 |
ge20nr09ruru_bfc092dff6c6_000000000000_000000000000 | 6 |
ge20nr12enus_979a40433f82_000000000000_000000000000 | 4 |
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. | 41 |
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, +32 more.The fingerprint page shows the full measured match list. More on the catalog. | 35 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:42|m,p,a,s | 15 |
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, +13 more.The fingerprint page shows the full measured match list. More on the catalog. | 11 |
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s | 11 |
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s | 9 |
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 158.0.1, firefox 155.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:42|m,p,a,s | 8 |
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s | 7 |
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:22|m,p,a,s | 6 |
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, +30 more.The fingerprint page shows the full measured match list. More on the catalog. | 37 |
Country
| fingerprint | co-occurrences |
|---|---|
HU · Hungary | 86 |
NL · Netherlands | 45 |
EE · Estonia | 20 |
DE · Germany | 16 |
SG · Singapore | 14 |
CY · Cyprus | 8 |
SE · Sweden | 7 |
BR · Brazil | 5 |
FR · France | 5 |
CN · China | 5 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS5483 · Magyar Telekom Plc. | 86 |
AS50673 · Serverius | 35 |
AS214790 · Brainoza OU | 20 |
AS207781 · Marcel Menzel | 13 |
AS141995 · Contabo Asia Private Limited | 10 |
AS57169 · EDIS GmbH | 8 |
AS215125 · Church of Cyberology | 8 |
AS212238 · Datacamp Limited | 5 |
AS9808 · China Mobile Communications Group Co., Ltd. | 5 |
AS15557 · Societe Francaise Du Radiotelephone - SFR SA | 5 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,0018,0019,0100,0101 | 83 |
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
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).