feat(webkit): roll to r2359

[microsoft-playwright-automation]

Browser build: https://github.com/microsoft/playwright-browsers/commit/e32b4c0e4cb8e61824ad6615b7c402e3b9597642. Build has full platform coverage - check that all tests pass there.

[github-actions]

Test results for "tests 1"

3 flaky

⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-event-request.spec.ts:181 › should return response body when Cross-Origin-Opener-Policy is set `@firefox-ubuntu-22.04-node20`

51295 passed, 1241 skipped

---

Merge workflow run.

[github-actions]

Test results for "MCP"

1 failed
❌ [firefox] › mcp/cli-drag.spec.ts:53 › drop files and data onto an element @mcp-windows-latest-firefox

8307 passed, 1377 skipped

---

Merge workflow run.

[github-actions]

Hi, I'm the Playwright bot and I took a first look at the CI failures here.

🟢 CI is clear — the one real failure is a pre-existing Windows/Firefox flake

This PR only bumps the WebKit revision (browsers.json, 2358 → 2359), so it can't touch Firefox on Windows — and that's the only failing test.

Details

Overall: the "tests 1" report has no real failures (3 flaky, all Firefox, passed on retry). The "MCP" report has a single failure that reproduces on main and unrelated PRs, well before this roll. Nothing points at the WebKit bump.

Pre-existing flake / infra

• [firefox] › mcp/cli-drag.spec.ts:53 › drop files and data onto an element on @mcp-windows-latest-firefox — pre-existing flake, confined to the Windows Firefox bot. In the CI results DB this exact test failed on mcp-windows-latest-firefox on main and on an unrelated PR long before this PR existed: run 31225630256 (main, 2026-08-07), run 31523555793 (main, 2026-08-11), run 32060840420 (PR fix(chromium): dispose worker sessions when their frame session is disposed #42282 fix-42278, 2026-08-17), and run 32155212762 (main, 2026-08-18). It passed on the Ubuntu and macOS Firefox bots for this PR's own run. A WebKit revision bump can't affect Firefox on Windows.

Flaky (already retried green in this report)

• [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies
• [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe
• [firefox-page] › page/page-event-request.spec.ts:181 › should return response body when Cross-Origin-Opener-Policy is set

All Firefox-only, all passed on retry — again untouched by a WebKit roll.

_{Triaged by the Playwright bot - agent run}

[github-actions]

Test results for "tests 2"

12 failed
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @tracing-chromium
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @msedge-dev-windows-latest
❌ [chromium-page] › page/page-route.spec.ts:277 › should work with custom referer headers @msedge-dev-windows-latest
❌ [chromium-page] › page/page-set-extra-http-headers.spec.ts:65 › should not duplicate referer header @msedge-dev-windows-latest
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @chrome-ubuntu-22.04
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @msedge-windows-latest
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @chrome-windows-latest
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @chrome-beta-ubuntu-22.04
❌ [chromium-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @chrome-macos-latest
❌ [firefox-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @tracing-firefox
❌ [webkit-library] › library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options @tracing-webkit
❌ [webkit-page] › page/page-leaks.spec.ts:136 › expect should not leak @webkit-macos-15-xlarge

26 flaky

⚠️ [chromium-library] › library/chromium/chromium.spec.ts:179 › serviceWorker(), and fromServiceWorker() work `@chromium-macos-15-large`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:213 › should intercept service worker requests (main and within) `@chromium-macos-14-xlarge`
⚠️ [chromium-library] › library/chromium/oopif.spec.ts:179 › should take screenshot `@chromium-macos-14-xlarge`
⚠️ [chromium-library] › library/trace-viewer.spec.ts:1695 › should highlight locator in iframe while typing `@chromium-macos-15-xlarge`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:179 › serviceWorker(), and fromServiceWorker() work `@chrome-beta-ubuntu-22.04`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:373 › should produce network events, routing, and annotations for Service Worker `@chrome-beta-ubuntu-22.04`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:436 › should produce network events, routing, and annotations for Service Worker (advanced) `@chrome-beta-ubuntu-22.04`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:213 › should intercept service worker requests (main and within) `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:165 › selector generator › should try to improve text by shortening `@chrome-macos-latest`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@tracing-firefox`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@tracing-firefox`
⚠️ [firefox-page] › page/page-event-request.spec.ts:181 › should return response body when Cross-Origin-Opener-Policy is set `@tracing-firefox`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-macos-15-large`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@firefox-macos-15-large`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-windows-latest`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@firefox-windows-latest`
⚠️ [firefox-library] › library/browsercontext-basic.spec.ts:163 › should propagate default viewport to the page `@firefox-macos-15-xlarge`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-macos-15-xlarge`
⚠️ [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe `@firefox-macos-15-xlarge`
⚠️ [firefox-library] › library/browsercontext-viewport.spec.ts:132 › should set both screen and viewport options `@firefox-macos-15-xlarge`
⚠️ [firefox-library] › library/trace-viewer.spec.ts:1915 › should not leak recorders `@firefox-macos-15-xlarge`
⚠️ [firefox-page] › page/page-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-macos-15-xlarge`
⚠️ [webkit-library] › library/inspector/cli-codegen-python-async.spec.ts:24 › should print the correct imports and context options `@webkit-windows-latest`
⚠️ [webkit-library] › library/tracing.spec.ts:533 › should produce screencast frames fit `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/video.spec.ts:113 › screencast › should capture static page `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/browsertype-connect.spec.ts:807 › launchServer › should upload a folder `@webkit-macos-15-large`

110521 passed, 4723 skipped

---

Merge workflow run.

[github-actions]

Hi, I'm the Playwright bot and I took a second look — a new "tests 2" report landed after my first pass, and it changes the verdict.

🔴 One failure looks caused by this WebKit roll

page/page-leaks.spec.ts:136 leaks under WebKit r2359 on webkit-macos-15-xlarge — a reproducible regression, not a flake.

Details

Overall: the earlier "tests 1" and "MCP" reports were clean (Firefox-only flakes + a pre-existing Windows/Firefox flake). The new "tests 2" report has 12 failures. Eleven of them are one cross-browser test that also fails on main, so a WebKit bump can't be the cause. The twelfth is WebKit-only and reproduces only on this roll — that's the real one.

Caused by this PR

• [webkit-page] › page/page-leaks.spec.ts:136 › expect should not leak on @webkit-macos-15-xlarge — in the CI results DB this test has run 1865 times since 2026-07-21 and failed exactly once: here, on this PR (run 33550220867). It passed 301 prior times on this exact bot. It failed all four attempts with the same assertion — expect(objectCount).toBeLessThan(25), Received: 58 — so it's a consistent object-retention regression, not a timeout blip. A leak test that only regresses on a WebKit binary bump points squarely at r2359. Worth confirming against the browser build before merging.

Pre-existing flake / infra (not this PR)

• library/browsertype-connect.spec.ts:1165 › should filter local paths from unsafe launch options — failed across chromium, firefox, webkit, msedge, and chrome bots in this report, and in the DB it also fails on main (pr_number null, run started 2026-09-01 19:32). A WebKit-only revision bump cannot break Chromium/Firefox/MSEdge, and it's broken off this PR's branch anyway — so this is a separate, cross-browser breakage landing around the same time, not caused by this roll.

Flaky (rescued on retry, ignore)

• 26 tests passed on retry — Firefox cookie/viewport tests, Chromium service-worker tests, and four WebKit tests (tracing.spec.ts:533, video.spec.ts:113, cli-codegen-python-async.spec.ts:24, browsertype-connect.spec.ts:807). All flipped green within the run.

_{Triaged by the Playwright bot - agent run}