General
Updated 10/23/2026
Supported User Agents
Use this reference to choose the browser that solves a task. The turnstile, interstitial, datadome, and akamai task types accept an optional useragent request field that selects the solver browser by family, platform, and version.
Cookie-bound results (interstitial, datadome, and akamai) include the solved browser profile's actual user-agent in solution.useragent. Replay cookies with that exact string, because the session is bound to it.
What the useragent Field Selects
| Part | Recognized in the string | Effect |
|---|---|---|
| Browser family | Chrome/Chromium (Chrome/, Chromium/, CriOS/) or Firefox (Firefox/, FxiOS/) | Selects the browser kernel family. |
| Platform | Windows, macOS, Linux, Android, or iOS platform tokens | Selects the matching platform persona. Android and iOS run in device mode. |
| Version | The browser major version — Chrome/150.0.0.0 → 150, CriOS/150.0.7871.47 → 150, Firefox/153.0 → 153 | interstitial, datadome, and akamai open that exact browser version. turnstile selects family and platform only and chooses the version itself. |
| Task type | useragent | Selects | When omitted |
|---|---|---|---|
| Cloudflare Turnstile | Optional | Browser family + platform. A useragent (like a custom proxy) gives the task a dedicated browser instead of a shared pool slot. | The solver's default shared pool browser. |
| Cloudflare Interstitial | Optional (proxy required) | Browser family + platform + exact version. | The newest installed Chrome version. |
| DataDome | Optional (proxy required) | Browser family + platform + exact version. | The newest installed Chrome version with the default macOS desktop profile. |
| Akamai | Optional (proxy required) | Browser family + platform + exact version. | The node's default browser profile; solution.useragent reports the identity that was used. |
Chrome / Chromium
Supported versions: Chrome 146 and newer. The strings below cover Chrome 146 through Chrome 154 on every platform; newer Chrome releases are added to the fleet over time.
If a task requests a version that is not available on the solving node, the task fails with an explicit error instead of silently running a different version.
Windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36
macOS
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36
Linux
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36
Android
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Mobile Safari/537.36
iOS
Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/146.0.7680.80 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 15_0_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/147.0.7727.56 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/148.0.7778.97 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 17_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/149.0.7827.54 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.7871.47 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/151.0.7922.47 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 15_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/152.0.7977.54 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 16_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/153.0.8010.27 Mobile/15E148 Safari/604.1
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/154.0.8037.44 Mobile/15E148 Safari/604.1
Firefox
Supported versions: Firefox 147, 150, and 153.
interstitial,datadome, andakamaiaccept all three versions.turnstileaccepts Firefox 150 and 153; do not use Firefox 147 for Turnstile tasks.
Windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.0
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:150.0) Gecko/20100101 Firefox/150.0
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0
macOS
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:150.0) Gecko/20100101 Firefox/150.0
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:153.0) Gecko/20110101 Firefox/153.0
Linux
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:147.0) Gecko/20100101 Firefox/147.0
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0
Android
Mozilla/5.0 (Android 12; Mobile; rv:147.0) Gecko/147.0 Firefox/147.0
Mozilla/5.0 (Android 12; Mobile; rv:150.0) Gecko/150.0 Firefox/150.0
Mozilla/5.0 (Android 13; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0
iOS
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/147.0 Mobile/15E148 Safari/605.1.15
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/150.0 Mobile/15E148 Safari/605.1.15
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/153.0 Mobile/15E148 Safari/605.1.15
Profile and Replay Notes
- Every solve mints a fresh browser profile, so minor details of the returned user-agent can vary between solves within a supported version — for example the iOS version, the Android release and Gecko build digits on Firefox profiles, and the macOS minor version or Linux variant on Firefox profiles. The strings on this page are exact and accepted as request values.
- Replay cookie-based results with the returned
solution.useragentthrough the same proxy exit. For Chrome profiles, send Client Hints (sec-ch-ua,sec-ch-ua-mobile,sec-ch-ua-platform) consistent with the returned version; Firefox profiles send no Client Hints. - The
useragentfield accepts at most 512 characters.
Other Task Types
Other task types may also accept a useragent field with task-specific behavior — see the individual task pages. The family, platform, and version selection described on this page applies to turnstile, interstitial, and datadome.