[Compare](https://cdpfleet.com/docs/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](https://cdpfleet.com/docs/browsers/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](https://cdpfleet.com/docs/compare/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](https://cdpfleet.com/docs/browsers/chrome) 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` (Chrome 157) | 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 (listed for Chrome 160) | no | no |
| CSS `symbols()` (Chrome 155) | yes | 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) | yes | 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.

|  | 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.

---
Source: https://cdpfleet.com/docs/compare/chrome-155-vs-154 · Markdown: https://cdpfleet.com/docs/compare/chrome-155-vs-154.md · All docs for AI tools: https://cdpfleet.com/llms.txt