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 Rebrowser

Patchright and 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 headful — see 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` (new in Chrome 154)	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 (Chrome 155)	no	no
CSS `symbols()` (Chrome 155)	no	no
`Element.streamAppendHTML` (Chrome 155)	no	no
`WebTransport.reliability` (Chrome 155)	no	no
`window.maximize()` — Additional Windowing Controls (Chrome 155)	no	no
Canvas `srgb-linear` colour space (Chrome 155)	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`) — removal starts in 157	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.