User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0
first seen 2026-06-17 00:43 · last seen 2026-07-14 18:41 · JSON
Decomposed attributes
| Browser / client | Firefox 146.0 |
|---|
| 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)
HTTP request (JA4H)
HTTP/2 frames (Akamai)
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|
4:57+7:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0 | 2 |
4:117+11:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
4:111+17:0:1460:65535,1:mss,nop,ws,nop,nop,sok:df,id+,ecn:0 | 1 |
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, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
Country
| fingerprint | co-occurrences |
|---|
US · United States | 4 |
NL · Netherlands | 2 |
FR · France | 1 |
Network (ASN)
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).