q13d0313h3_55b375c5d22e_4effff169a46 |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv… |
User-Agent claims Firefox 147.0 |
TLS extensions or signature algorithms differ from every measured Firefox capture
The cipher suites match Firefox, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.
| Full User-Agent | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0 |
|---|
| Claimed version | 147.0 |
|---|
| Measured versions | 146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0 |
|---|
| Layer | cipher suites match; extension set or signature algorithms differ |
|---|
| JA4 label | unlabeled |
|---|
|
low |
3 |
2026-07-05 |
2026-09-01 |
q13d0313h3_55b375c5d22e_4effff169a46 |
Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/… |
User-Agent claims Firefox 152.0 |
TLS extensions or signature algorithms differ from every measured Firefox capture
The cipher suites match Firefox, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.
| Full User-Agent | Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
|---|
| Claimed version | 152.0 |
|---|
| Measured versions | 146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0 |
|---|
| Layer | cipher suites match; extension set or signature algorithms differ |
|---|
| JA4 label | unlabeled |
|---|
|
low |
2 |
2026-07-18 |
2026-07-18 |
q13d0313h3_55b375c5d22e_4effff169a46 |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151… |
User-Agent claims Firefox 151.0 |
TLS extensions or signature algorithms differ from every measured Firefox capture
The cipher suites match Firefox, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.
| Full User-Agent | Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0 |
|---|
| Claimed version | 151.0 |
|---|
| Measured versions | 146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0 |
|---|
| Layer | cipher suites match; extension set or signature algorithms differ |
|---|
| JA4 label | unlabeled |
|---|
|
low |
1 |
2026-07-18 |
2026-07-18 |