Compare / versions

Chrome 155 vs Chrome 154

Chrome 155 on the fleet: four web features a page can detect, the same TLS and HTTP/2 fingerprint as 154, and release-note features sessions don't get.

Google Chrome

Chrome 155 went stable on 6 October 2026. The fleet runs it as stable (155.0.8059.39) and keeps 154 as a pinned previous major ({"version": "154"}, 154.0.8037.97) until it rotates out; 156 and 157 are beta and dev. Below: what Google lists for 155, what we measured as different from inside a page and on the wire, and what that means for detection and for your code. For the step before, see Chrome 154 vs 153.

New in 155, measured on the fleet

Present in 155 and absent in 154 in our probe (rows highlighted in the table below):

CSS margin-trim — trims the margins of a container's first and last children against its edges.
CSS symbols() in list-style-type — anonymous counter styles without an @counter-style rule.
CSS text-decoration-skip-spaces — whether underlines skip leading and trailing spaces.
Permissions Policy media-playback-while-not-visible — Chrome pauses media in iframes that aren't visible unless the policy allows it.

In the release notes, but not in automated sessions

WebTransport reliability attributes (WebTransport.prototype.reliability), srgb-linear / display-p3-linear colour spaces and Additional Windowing Controls (window.maximize(), minimize(), restore()): listed for 155, but not exposed in fleet sessions on either version (measured). Windowing controls need the window-management permission and an installed web app; for the others, Playwright launches Chrome with --disable-field-trial-config, so features Google turns on through gradual rollouts stay off in automated sessions.
Also listed, not probed: JPEG XL decoding (image/jxl), Digital Credentials issuance, text modules (import ... with { type: "text" }), new WebCrypto algorithms, WebTransport datagram streams, and WebGPU atomic-vec2u-min-max.

What a site sees

	Chrome 155	Chrome 154
User agent	`Chrome/155.0.0.0` (reduced, as always).	`Chrome/154.0.0.0`.
Client hints	Brands `Google Chrome 155`, `Chromium 155` and a GREASE brand `Not(A:Brand 24`; full version `155.0.8059.39`.	Brands `Chromium 154`, `Google Chrome 154` and the GREASE brand `Not A(Brand 99` — Chrome changes the order and GREASE brand every major; full version `154.0.8037.97`.
TLS and HTTP/2	JA4, peetprint, HTTP/2 SETTINGS and header order identical to 154 (JA3 differs per connection because of GREASE, as on every Chrome).	The same.
Fingerprint and bot checks	Same canvas, WebGL (SwiftShader), plugins and languages; bot.sannysoft.com flags only "WebGL Renderer".	The same.
Playwright	Every probed feature works: main-world evaluate, console events, init scripts, routing, screenshots, PDF, device emulation, tracing.	The same.

For scraping and detection

A version claim can be checked. The four features above are cheap to test from a page, so a site can tell whether a browser that says "Chrome 155" really is one — keep the user agent and client hints you send consistent with the build you run, which is the default on the fleet.
Nothing changes on the wire. TLS and HTTP/2 fingerprints are the same as 154, so network-level bot scoring treats both alike.
Nothing to change in your code for 155; pin {"version": "154"} if you need the previous behaviour while it's still offered (the Chrome page lists the current majors).

Measured on the fleet (2026-10-13)

One headful launch of each through the same proxy, probed from inside a page and via tls.peet.ws.

Launch and cost

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

	Chrome 155	Chrome 154
Launch body	{"headless":false}	{"headless":false,"version":"154"}
Threads used	2 (linux_headful)	2 (linux_headful)
Browser version	155.0.8059.39	154.0.8037.97
Launch request → browser ready	0.8 s	1.5 s
Playwright connect	0.0 s	0.1 s
Load example.com	1.9 s	1.8 s
Load tls.peet.ws/api/all	2.1 s	1.8 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.

	Chrome 155	Chrome 154
HTTP version	h2	h2
JA4	t13d1517h2_8daaf6152771_cb7bf5808d99	t13d1517h2_8daaf6152771_cb7bf5808d99
Peetprint hash	fc97c1cdfb1409c9a9326c1b726d1dee	fc97c1cdfb1409c9a9326c1b726d1dee
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 / 19	16 / 19
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.

	Chrome 155	Chrome 154
navigator.userAgent	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.36	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36
UA-CH brands	Google Chrome 155 · Chromium 155 · Not(A:Brand 24	Chromium 154 · Google Chrome 154 · Not A(Brand 99
UA-CH full version list	Google Chrome 155.0.8059.39 · Chromium 155.0.8059.39 · Not(A:Brand 24.0.0.0	Chromium 154.0.8037.97 · Google Chrome 154.0.8037.97 · Not A(Brand 99.0.0.0
navigator.platform / vendor	Linux x86_64 / Google Inc.	Linux x86_64 / Google Inc.
Languages	en-US, en	en-US, en
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	16 / 32	64 / 32
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	f5a94624
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.

	Chrome 155	Chrome 154
`Iterator.prototype.includes` (new in Chrome 154)	yes	yes
`FontFace.width` (new in Chrome 154)	yes	yes
CSS `text-decoration-inset` (new in Chrome 154)	no	no
`Iterator.prototype.join` (Chrome 153)	yes	yes
`Iterator.zip` (Chrome 153)	yes	yes
CSS `scroll-axis-lock` (Chrome 153)	no	no
`<camera>` element (Chrome 153)	yes	yes
`document.requestStorageAccessFor` (deprecated in 153)	no	no
Topics API (`document.browsingTopics`)	yes	yes
Protected Audience (`navigator.joinAdInterestGroup`)	yes	yes
Shared Storage (`window.sharedStorage`)	no	no
Attribution Reporting (`window.attributionReporting`)	no	no
Private Aggregation	no	no
WebHID (`navigator.hid`)	yes	yes
CSS `margin-trim` (Chrome 155)	yes	no
CSS `text-decoration-skip-spaces` (Chrome 155)	yes	no
CSS `corner` shorthand (Chrome 155)	no	no
CSS `symbols()` (Chrome 155)	yes	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)	yes	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.

	Chrome 155	Chrome 154
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?

	Chrome 155	Chrome 154
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.

	Chrome 155	Chrome 154
page.evaluate runs in the page's own world	yes	yes
addInitScript visible to page scripts	yes	yes
Console events	yes	yes
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": "2026-10-13T01:06:16.860Z",
  "sides": [
    {
      "label": "Chrome 155",
      "engine": "chrome",
      "body": {
        "headless": false
      },
      "launch": {
        "browser": "chrome",
        "resource_class": "linux_headful",
        "weight": 2,
        "launch_ms": 768,
        "connect_ms": 31,
        "example_ms": 1890,
        "peet_ms": 2066
      },
      "network": {
        "http_version": "h2",
        "ja4": "t13d1517h2_8daaf6152771_cb7bf5808d99",
        "ja3_hash": "779945d693ea83e22c897ad519fe7901",
        "peetprint_hash": "fc97c1cdfb1409c9a9326c1b726d1dee",
        "ciphers": 16,
        "extensions": 19,
        "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/155.0.0.0 Safari/537.36",
        "platform": "Linux x86_64",
        "vendor": "Google Inc.",
        "languages": [
          "en-US",
          "en"
        ],
        "hardware_concurrency": 16,
        "device_memory": 32,
        "max_touch_points": 0,
        "webdriver": false,
        "plugins": 5,
        "pdf_viewer": true,
        "ua_data": {
          "brands": [
            {
              "brand": "Google Chrome",
              "version": "155"
            },
            {
              "brand": "Chromium",
              "version": "155"
            },
            {
              "brand": "Not(A:Brand",
              "version": "24"
            }
          ],
          "mobile": false,
          "platform": "Linux",
          "architecture": "x86",
          "bitness": "64",
          "formFactors": [
            "Desktop"
          ],
          "fullVersionList": [
            {
              "brand": "Google Chrome",
              "version": "155.0.8059.39"
            },
            {
              "brand": "Chromium",
              "version": "155.0.8059.39"
            },
            {
              "brand": "Not(A:Brand",
              "version": "24.0.0.0"
            }
          ],
          "model": "",
          "platformVersion": "",
          "uaFullVersion": "155.0.8059.39",
          "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": true,
          "iterator_join": true,
          "iterator_zip": true,
          "fontface_width": true,
          "css_text_decoration_inset": false,
          "css_scroll_axis_lock": false,
          "websocket_options_bag": null,
          "camera_element": true,
          "topics_api": true,
          "protected_audience": true,
          "shared_storage": false,
          "attribution_reporting": false,
          "request_storage_access_for": false,
          "webhid": true,
          "private_aggregation": false,
          "css_margin_trim": true,
          "css_text_decoration_skip_spaces": true,
          "css_corner_shorthand": false,
          "css_symbols": true,
          "stream_append_html": false,
          "webtransport_reliability": false,
          "window_maximize": false,
          "canvas_srgb_linear": false,
          "policy_media_playback_while_not_visible": true,
          "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": true,
        "init_script": true,
        "route": true,
        "screenshot": true,
        "pdf": true,
        "mobile_emulation": true,
        "tracing": true
      },
      "browser_version": "155.0.8059.39"
    },
    {
      "label": "Chrome 154",
      "engine": "chrome",
      "body": {
        "headless": false,
        "version": "154"
      },
      "launch": {
        "browser": "chrome",
        "resource_class": "linux_headful",
        "weight": 2,
        "launch_ms": 1470,
        "connect_ms": 123,
        "example_ms": 1847,
        "peet_ms": 1753
      },
      "network": {
        "http_version": "h2",
        "ja4": "t13d1517h2_8daaf6152771_cb7bf5808d99",
        "ja3_hash": "89559ff64da8289f3eab11edc23966ef",
        "peetprint_hash": "fc97c1cdfb1409c9a9326c1b726d1dee",
        "ciphers": 16,
        "extensions": 19,
        "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/154.0.0.0 Safari/537.36",
        "platform": "Linux x86_64",
        "vendor": "Google Inc.",
        "languages": [
          "en-US",
          "en"
        ],
        "hardware_concurrency": 64,
        "device_memory": 32,
        "max_touch_points": 0,
        "webdriver": false,
        "plugins": 5,
        "pdf_viewer": true,
        "ua_data": {
          "brands": [
            {
              "brand": "Chromium",
              "version": "154"
            },
            {
              "brand": "Google Chrome",
              "version": "154"
            },
            {
              "brand": "Not A(Brand",
              "version": "99"
            }
          ],
          "mobile": false,
          "platform": "Linux",
          "architecture": "x86",
          "bitness": "64",
          "formFactors": [
            "Desktop"
          ],
          "fullVersionList": [
            {
              "brand": "Chromium",
              "version": "154.0.8037.97"
            },
            {
              "brand": "Google Chrome",
              "version": "154.0.8037.97"
            },
            {
              "brand": "Not A(Brand",
              "version": "99.0.0.0"
            }
          ],
          "model": "",
          "platformVersion": "",
          "uaFullVersion": "154.0.8037.97",
          "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": true,
          "iterator_join": true,
          "iterator_zip": true,
          "fontface_width": true,
          "css_text_decoration_inset": false,
          "css_scroll_axis_lock": false,
          "websocket_options_bag": null,
          "camera_element": true,
          "topics_api": true,
          "protected_audience": true,
          "shared_storage": false,
          "attribution_reporting": false,
          "request_storage_access_for": false,
          "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": true,
        "init_script": true,
        "route": true,
        "screenshot": true,
        "pdf": true,
        "mobile_emulation": true,
        "tracing": true
      },
      "browser_version": "154.0.8037.97"
    }
  ]
}

Bottom line

Chrome 155 is a quiet release for scrapers: four detectable CSS and policy features, identical network fingerprints, and a handful of release-note features that automated sessions don't get.