User-Agent
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0
first seen 2026-07-26 01:13 · last seen 2026-10-31 00:28 · JSON
Last 7 days (10 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 / client | Firefox 153.0 |
|---|---|
| Operating system | Linux x86_64 |
| 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. | 143 |
t13d1617h2_86a278354501_3e9721a6796e | 34 |
t13d1615h2_86a278354501_a54fffd0eb61 | 27 |
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. | 27 |
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. | 11 |
q13d0314h3_55b375c5d22e_1ecea7cb6ec1 | 3 |
q13d0315h3_55b375c5d22e_78345df32b3a | 3 |
t13d1614h2_86a278354501_53a6d0ab1c42 | 2 |
t13d1516h2_8daaf6152771_0c27189014cf Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 155.0.1, firefox 155.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d301300_1d37bd780c83_5ae85263eb3b | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr11enus_187a9385d229_000000000000_000000000000 | 20 |
ge20nr12en00_979a40433f82_000000000000_000000000000 | 13 |
ge20nr11enus_3901d4197baf_000000000000_000000000000 | 12 |
ge20nn12enus_a72b71f519fc_000000000000_000000000000 | 11 |
ge20nr12enus_a72b71f519fc_000000000000_000000000000 | 9 |
ge20nr13heil_9e2b86631664_000000000000_000000000000 | 9 |
ge20nr13ruru_9e2b86631664_000000000000_000000000000 | 9 |
ge20nr13deat_9e2b86631664_000000000000_000000000000 | 9 |
ge20nr13enie_9e2b86631664_000000000000_000000000000 | 6 |
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. | 5 |
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. | 132 |
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. | 28 |
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. | 8 |
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. | 7 |
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:22|m,p,a,s | 6 |
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s | 4 |
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|11:0:0:42|m,p,a,s | 3 |
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s | 3 |
1:65536;2:0;4:131072;5:16384|12517377|19:0:0:42|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. | 33 |
Country
| fingerprint | co-occurrences |
|---|---|
CH · Switzerland | 39 |
NL · Netherlands | 36 |
CA · Canada | 36 |
GB · United Kingdom | 20 |
US · United States | 16 |
IL · Israel | 13 |
FR · France | 12 |
RU · Russia | 11 |
AT · Austria | 10 |
IE · Ireland | 9 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS6730 · Sunrise GmbH | 28 |
AS5645 · TekSavvy Solutions, Inc. | 21 |
AS31615 · Odido Netherlands B.V. | 18 |
AS206238 · Freedom Internet BV | 12 |
AS209 · CenturyLink Communications, LLC | 10 |
AS206067 · Hutchison 3G UK Limited | 10 |
AS57169 · EDIS GmbH | 8 |
AS9141 · P4 Sp. z o.o. | 8 |
AS1680 · Cellcom Fixed Line Communication L.P | 7 |
AS8447 · A1 Telekom Austria AG | 6 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,0018,0019,0100,0101 | 9 |
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).