[Compare](https://cdpfleet.com/docs/compare) / browsers

# Patchright vs Rebrowser

Two stealth-patched Chromium builds that look the same to a site — same TLS and HTTP/2 fingerprints, no webdriver, no Runtime.enable leak — but Patchright is Chromium 148 on today's Playwright, and Rebrowser is Chromium 136 pinned to Playwright 1.52.

[Patchright](https://cdpfleet.com/docs/browsers/patchright) [Rebrowser](https://cdpfleet.com/docs/browsers/rebrowser)

[Patchright](https://cdpfleet.com/docs/browsers/patchright) and [Rebrowser](https://cdpfleet.com/docs/browsers/rebrowser) solve the same problem — Playwright's own automation tells — in the same place: the driver layer, not the browser. Patchright patches the Playwright driver and runs Playwright's Chromium; Rebrowser patches Playwright 1.52 and its Chromium. On the fleet both run headful by default (2 threads). The question is what each costs you as a developer, and whether a site can tell them apart from real users — or from each other.

## As a developer: driving them

|  | Patchright | Rebrowser |
| --- | --- | --- |
| Chromium on the fleet | 148 (Playwright's current build). | **136** — 19 majors behind today's Chrome 155. |
| Playwright client | 1.60 — the same client as every other browser here. | **1.52 only**: newer clients time out on connect, so your project pins an old Playwright just for this browser. |
| Options | `headless`, timeouts, proxies and rules, `live_view`, `screen_size`, `keep_alive`, recordings, client-side `screencast`. | The same minus `keep_alive` (its 1.52 server can't keep contexts across connections) and `page.screencast` (1.52 has no such API). Neither offers `cdp` — their stealth lives in the Playwright layer CDP would bypass. |
| Playwright features | Main-world evaluate, init scripts, routing, screenshots, PDF, device emulation, tracing (measured). | The same list (measured). |
| Console events | **Don't fire** (`page.on("console")` stays silent) — the price of hiding `Runtime.enable`. | **Don't fire either** (measured). |
| Connect time | About 30 ms after launch in our run. | About 1.7 s after launch (the 1.52 handshake). |

## As a scraper: what the site sees

|  | Patchright | Rebrowser |
| --- | --- | --- |
| User agent | `Chrome/148.0.0.0` | `Chrome/136.0.0.0` — a version real users left long ago. |
| Client hints | Brands `Chromium 148` (+ GREASE) — no `Google Chrome`. | Brands `Chromium 136` (+ GREASE) — no `Google Chrome` either. |
| TLS and HTTP/2 | JA4 `t13d1516h2_8daaf6152771_d8a2da3f94cd`; Chromium's SETTINGS and header order. | **Identical** JA4, SETTINGS and header order (measured). |
| Automation tells | `navigator.webdriver` false; no `Runtime.enable` leak (a debugger-triggered stack read stays unread). | **The same** (measured). |
| Bot checks | bot.sannysoft.com: only "WebGL Renderer" flagged (SwiftShader on a GPU-less server). | The same single flag. |
| What still gives them away | The missing `Google Chrome` brand and a Chromium version Chrome never shipped as stable. | The same brand gap and a much older version. |

## Which to pick

-   **Patchright** in almost every case: the same stealth result, a current Chromium, the same Playwright client as the rest of your code, and `keep_alive`.
-   **Rebrowser** only if a site's checks pass on it and not on Patchright — they measure the same here, so test both on your target — or if your code is already on Playwright 1.52.
-   **When the brand matters,** neither is enough: sites reading client hints see `Chromium`, not `Google Chrome`. Use real [Chrome](https://cdpfleet.com/docs/browsers/chrome) headful — see [stealth builds](https://cdpfleet.com/docs/cases/stealth-builds).

## Measured on the fleet (2026-10-10)

One headful launch of each through the same proxy, probed from inside a page and via tls.peet.ws; Rebrowser driven with the Playwright 1.52 client it requires.

### Launch and cost

Single run; timings depend on the proxy and on fleet load.

|  | Patchright | Rebrowser |
| --- | --- | --- |
| Launch body | {"headless":false} | {"headless":false} |
| Threads used | 2 (linux\_headful) | 2 (linux\_headful) |
| Browser version | 148.0.7778.96 | 136.0.7103.25 |
| Launch request → browser ready | 2.2 s | 1.3 s |
| Playwright connect | 0.0 s | 1.7 s |
| Load example.com | 1.2 s | 0.8 s |
| Load tls.peet.ws/api/all | 2.7 s | 0.9 s |

### What the network sees

From tls.peet.ws/api/all, requested by the browser itself. JA3 hashes change between runs of the same build (GREASE), so compare JA4 and the HTTP/2 fingerprint.

|  | Patchright | Rebrowser |
| --- | --- | --- |
| HTTP version | h2 | h2 |
| JA4 | t13d1516h2\_8daaf6152771\_d8a2da3f94cd | t13d1516h2\_8daaf6152771\_d8a2da3f94cd |
| Peetprint hash | 1d4ffe9b0e34acac0bd883fa7f79d7b5 | 1d4ffe9b0e34acac0bd883fa7f79d7b5 |
| Akamai HTTP/2 fingerprint | 1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p | 1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p |
| Cipher suites / extensions | 16 / 18 | 16 / 18 |
| Header order (first 12) | method, authority, scheme, path, sec-ch-ua, sec-ch-ua-mobile, sec-ch-ua-platform, upgrade-insecure-requests, user-agent, accept, sec-fetch-site, sec-fetch-mode | method, authority, scheme, path, sec-ch-ua, sec-ch-ua-mobile, sec-ch-ua-platform, upgrade-insecure-requests, user-agent, accept, sec-fetch-site, sec-fetch-mode |

### What page scripts see

Read with page.evaluate on example.com. Cores and memory are the server's and vary between fleet nodes.

|  | Patchright | Rebrowser |
| --- | --- | --- |
| navigator.userAgent | 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/136.0.0.0 Safari/537.36 |
| UA-CH brands | Not/A)Brand 99 · Chromium 148 | Not.A/Brand 99 · Chromium 136 |
| UA-CH full version list | Not/A)Brand 99.0.0.0 · Chromium 148.0.7778.96 | Not.A/Brand 99.0.0.0 · Chromium 136.0.7103.25 |
| navigator.platform / vendor | Linux x86\_64 / Google Inc. | Linux x86\_64 / Google Inc. |
| Languages | en-US | en-US |
| Timezone / locale | UTC / en-US | UTC / en-US |
| Screen (w×h×availW×availH×depth) | 1280x720x1280x720x24 | 1280x720x1280x720x24 |
| Window outer / inner / DPR | 1288x805 / 1280x720 / 1 | 1288x805 / 1280x720 / 1 |
| hardwareConcurrency / deviceMemory | 64 / 32 | 16 / 8 |
| WebGL vendor | Google Inc. (Google) | Google Inc. (Google) |
| WebGL renderer | ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver) | ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver) |
| WebGL version | WebGL 2.0 (OpenGL ES 3.0 Chromium) | WebGL 2.0 (OpenGL ES 3.0 Chromium) |
| WebGPU (navigator.gpu) | yes | yes |
| Canvas hash | f5a94624 | f972017a |
| navigator.webdriver | no | no |
| window.chrome / navigator.connection | yes / yes | yes / yes |
| Plugins / PDF viewer | 5 / yes | 5 / yes |
| Notification.permission / permissions.query | default / prompt | default / prompt |

### Web platform features

Presence probes; a user agent that claims one version while exposing another's features is a detectable inconsistency.

|  | Patchright | Rebrowser |
| --- | --- | --- |
| `Iterator.prototype.includes` (new in Chrome 154) | no | no |
| `FontFace.width` (new in Chrome 154) | no | no |
| CSS `text-decoration-inset` (Chrome 157) | no | no |
| `Iterator.prototype.join` (Chrome 153) | no | no |
| `Iterator.zip` (Chrome 153) | no | no |
| CSS `scroll-axis-lock` (Chrome 153) | no | no |
| `<camera>` element (Chrome 153) | no | no |
| `document.requestStorageAccessFor` (deprecated in 153) | yes | yes |
| Topics API (`document.browsingTopics`) | yes | yes |
| Protected Audience (`navigator.joinAdInterestGroup`) | yes | yes |
| Shared Storage (`window.sharedStorage`) | yes | yes |
| Attribution Reporting (`window.attributionReporting`) | no | no |
| Private Aggregation | no | no |
| WebHID (`navigator.hid`) | yes | yes |
| CSS `margin-trim` (Chrome 155) | no | no |
| CSS `text-decoration-skip-spaces` (Chrome 155) | no | no |
| CSS `corner` shorthand (listed for Chrome 160) | no | no |
| CSS `symbols()` (Chrome 155) | no | no |
| `Element.streamAppendHTML` (Chrome 157) | no | no |
| `WebTransport.reliability` (on stable from Chrome 157; listed for 158) | no | no |
| `window.maximize()` — Additional Windowing Controls (Chrome 155) | no | no |
| Canvas `srgb-linear` colour space (on stable from Chrome 157) | no | no |
| Permission policy `media-playback-while-not-visible` (Chrome 155) | no | no |
| CSS `random()` (Chrome 156) | no | no |
| CSS `scroll-snap-type: pair` (Chrome 156) | no | no |
| Fenced frames (`window.fence`) | yes | yes |
| `rel=compression-dictionary` (Chrome 156 updates) | yes | yes |

### bot.sannysoft.com

The classic headless-detection test page; what it marks red.

|  | Patchright | Rebrowser |
| --- | --- | --- |
| Checks / failed | 57 / 1 | 57 / 1 |
| Failed checks | WebGL Renderer | WebGL Renderer |

### A plain-HTTP URL (http://ip-api.com/json)

Chrome 154 warns before loading insecure HTTP by default — does that reach an automated session?

|  | Patchright | Rebrowser |
| --- | --- | --- |
| Final URL | http://ip-api.com/json/?fields=status | http://ip-api.com/json/?fields=status |
| HTTP status | 200 | 200 |
| Content loaded / warning page first | yes / no | yes / no |

### Playwright over the remote connection

Which client features work on this side.

|  | Patchright | Rebrowser |
| --- | --- | --- |
| page.evaluate runs in the page's own world | yes | yes |
| addInitScript visible to page scripts | yes | yes |
| Console events | no | no |
| Request interception (page.route) | yes | yes |
| Screenshot | yes | yes |
| PDF | yes | yes |
| Mobile device emulation | yes | yes |
| Tracing | yes | yes |

Rows where the two sides differ are highlighted. IP addresses are replaced with placeholders (203.0.113.x). The probe is `compare/probe.mjs` in our repository; the raw result is below.

Raw output

```
{
  "ran_at": "2026-10-10T01:11:20.722Z",
  "sides": [
    {
      "label": "Patchright",
      "engine": "patchright",
      "body": {
        "headless": false
      },
      "launch": {
        "browser": "patchright",
        "resource_class": "linux_headful",
        "weight": 2,
        "launch_ms": 2211,
        "connect_ms": 34,
        "example_ms": 1239,
        "peet_ms": 2672
      },
      "network": {
        "http_version": "h2",
        "ja4": "t13d1516h2_8daaf6152771_d8a2da3f94cd",
        "ja3_hash": "6c00bb0960533a55229341f0aaa35f5c",
        "peetprint_hash": "1d4ffe9b0e34acac0bd883fa7f79d7b5",
        "ciphers": 16,
        "extensions": 18,
        "akamai_h2": "1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p",
        "akamai_h2_hash": "52d84b11737d980aef856699f885ca86",
        "header_order": [
          "method",
          "authority",
          "scheme",
          "path",
          "sec-ch-ua",
          "sec-ch-ua-mobile",
          "sec-ch-ua-platform",
          "upgrade-insecure-requests",
          "user-agent",
          "accept",
          "sec-fetch-site",
          "sec-fetch-mode"
        ]
      },
      "page": {
        "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
        "platform": "Linux x86_64",
        "vendor": "Google Inc.",
        "languages": [
          "en-US"
        ],
        "hardware_concurrency": 64,
        "device_memory": 32,
        "max_touch_points": 0,
        "webdriver": false,
        "plugins": 5,
        "pdf_viewer": true,
        "ua_data": {
          "brands": [
            {
              "brand": "Not/A)Brand",
              "version": "99"
            },
            {
              "brand": "Chromium",
              "version": "148"
            }
          ],
          "mobile": false,
          "platform": "Linux",
          "architecture": "x86",
          "bitness": "64",
          "formFactors": [
            "Desktop"
          ],
          "fullVersionList": [
            {
              "brand": "Not/A)Brand",
              "version": "99.0.0.0"
            },
            {
              "brand": "Chromium",
              "version": "148.0.7778.96"
            }
          ],
          "model": "",
          "platformVersion": "",
          "uaFullVersion": "148.0.7778.96",
          "wow64": false
        },
        "screen": "1280x720x1280x720x24",
        "window": {
          "outer": "1288x805",
          "inner": "1280x720",
          "dpr": 1
        },
        "timezone": "UTC",
        "locale": "en-US",
        "webgl": {
          "vendor": "Google Inc. (Google)",
          "renderer": "ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver)",
          "version": "WebGL 2.0 (OpenGL ES 3.0 Chromium)"
        },
        "canvas_hash": "f5a94624",
        "webgpu": true,
        "chrome_object": true,
        "chrome_runtime": false,
        "notification_permission": "default",
        "notification_query": "prompt",
        "has_focus": true,
        "connection_api": true,
        "stack_read_by_debugger": false,
        "features": {
          "iterator_includes": false,
          "iterator_join": false,
          "iterator_zip": false,
          "fontface_width": false,
          "css_text_decoration_inset": false,
          "css_scroll_axis_lock": false,
          "websocket_options_bag": null,
          "camera_element": false,
          "topics_api": true,
          "protected_audience": true,
          "shared_storage": true,
          "attribution_reporting": false,
          "request_storage_access_for": true,
          "webhid": true,
          "private_aggregation": false,
          "css_margin_trim": false,
          "css_text_decoration_skip_spaces": false,
          "css_corner_shorthand": false,
          "css_symbols": false,
          "stream_append_html": false,
          "webtransport_reliability": false,
          "window_maximize": false,
          "canvas_srgb_linear": false,
          "policy_media_playback_while_not_visible": false,
          "css_random": false,
          "css_scroll_snap_pair": false,
          "fenced_frames": true,
          "compression_dictionary": true
        }
      },
      "page_main_world": null,
      "sannysoft": {
        "checks": 57,
        "failed": 1,
        "failed_names": [
          "WebGL Renderer"
        ],
        "passed": 30
      },
      "plain_http": {
        "final_url": "http://ip-api.com/json/?fields=status",
        "status": 200,
        "title": "",
        "loaded": true,
        "warning_page": false,
        "page_text": "{\"status\":\"success\"}"
      },
      "playwright": {
        "evaluate_in_main_world": true,
        "console_events": false,
        "init_script": true,
        "route": true,
        "screenshot": true,
        "pdf": true,
        "mobile_emulation": true,
        "tracing": true
      },
      "browser_version": "148.0.7778.96"
    },
    {
      "label": "Rebrowser",
      "engine": "rebrowser",
      "body": {
        "headless": false
      },
      "launch": {
        "browser": "rebrowser",
        "resource_class": "linux_headful",
        "weight": 2,
        "launch_ms": 1329,
        "connect_ms": 1704,
        "example_ms": 775,
        "peet_ms": 949
      },
      "network": {
        "http_version": "h2",
        "ja4": "t13d1516h2_8daaf6152771_d8a2da3f94cd",
        "ja3_hash": "0b2bcd28c9104a2fa5008a3d1ecb3db1",
        "peetprint_hash": "1d4ffe9b0e34acac0bd883fa7f79d7b5",
        "ciphers": 16,
        "extensions": 18,
        "akamai_h2": "1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p",
        "akamai_h2_hash": "52d84b11737d980aef856699f885ca86",
        "header_order": [
          "method",
          "authority",
          "scheme",
          "path",
          "sec-ch-ua",
          "sec-ch-ua-mobile",
          "sec-ch-ua-platform",
          "upgrade-insecure-requests",
          "user-agent",
          "accept",
          "sec-fetch-site",
          "sec-fetch-mode"
        ]
      },
      "page": {
        "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36",
        "platform": "Linux x86_64",
        "vendor": "Google Inc.",
        "languages": [
          "en-US"
        ],
        "hardware_concurrency": 16,
        "device_memory": 8,
        "max_touch_points": 0,
        "webdriver": false,
        "plugins": 5,
        "pdf_viewer": true,
        "ua_data": {
          "brands": [
            {
              "brand": "Not.A/Brand",
              "version": "99"
            },
            {
              "brand": "Chromium",
              "version": "136"
            }
          ],
          "mobile": false,
          "platform": "Linux",
          "architecture": "x86",
          "bitness": "64",
          "formFactors": [
            "Desktop"
          ],
          "fullVersionList": [
            {
              "brand": "Not.A/Brand",
              "version": "99.0.0.0"
            },
            {
              "brand": "Chromium",
              "version": "136.0.7103.25"
            }
          ],
          "model": "",
          "platformVersion": "6.8.0",
          "uaFullVersion": "136.0.7103.25",
          "wow64": false
        },
        "screen": "1280x720x1280x720x24",
        "window": {
          "outer": "1288x805",
          "inner": "1280x720",
          "dpr": 1
        },
        "timezone": "UTC",
        "locale": "en-US",
        "webgl": {
          "vendor": "Google Inc. (Google)",
          "renderer": "ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver)",
          "version": "WebGL 2.0 (OpenGL ES 3.0 Chromium)"
        },
        "canvas_hash": "f972017a",
        "webgpu": true,
        "chrome_object": true,
        "chrome_runtime": false,
        "notification_permission": "default",
        "notification_query": "prompt",
        "has_focus": true,
        "connection_api": true,
        "stack_read_by_debugger": false,
        "features": {
          "iterator_includes": false,
          "iterator_join": false,
          "iterator_zip": false,
          "fontface_width": false,
          "css_text_decoration_inset": false,
          "css_scroll_axis_lock": false,
          "websocket_options_bag": null,
          "camera_element": false,
          "topics_api": true,
          "protected_audience": true,
          "shared_storage": true,
          "attribution_reporting": false,
          "request_storage_access_for": true,
          "webhid": true,
          "private_aggregation": false,
          "css_margin_trim": false,
          "css_text_decoration_skip_spaces": false,
          "css_corner_shorthand": false,
          "css_symbols": false,
          "stream_append_html": false,
          "webtransport_reliability": false,
          "window_maximize": false,
          "canvas_srgb_linear": false,
          "policy_media_playback_while_not_visible": false,
          "css_random": false,
          "css_scroll_snap_pair": false,
          "fenced_frames": true,
          "compression_dictionary": true
        }
      },
      "page_main_world": null,
      "sannysoft": {
        "checks": 57,
        "failed": 1,
        "failed_names": [
          "WebGL Renderer"
        ],
        "passed": 29
      },
      "plain_http": {
        "final_url": "http://ip-api.com/json/?fields=status",
        "status": 200,
        "title": "",
        "loaded": true,
        "warning_page": false,
        "page_text": "{\"status\":\"success\"}"
      },
      "playwright": {
        "evaluate_in_main_world": true,
        "console_events": false,
        "init_script": true,
        "route": true,
        "screenshot": true,
        "pdf": true,
        "mobile_emulation": true,
        "tracing": true
      },
      "browser_version": "136.0.7103.25"
    }
  ]
}
```

## Bottom line

To a website, Patchright and Rebrowser are the same browser at different ages: identical TLS, HTTP/2 and automation-tell results, both without console events, both announcing Chromium rather than Chrome.

The difference is on your side — a current Chromium and today's Playwright against an old Chromium and a pinned 1.52 client. Unless a target proves otherwise, choose Patchright.

---
Source: https://cdpfleet.com/docs/compare/patchright-vs-rebrowser · Markdown: https://cdpfleet.com/docs/compare/patchright-vs-rebrowser.md · All docs for AI tools: https://cdpfleet.com/llms.txt