feat(chromium): roll to r1246

[microsoft-playwright-automation]

Browser build: https://github.com/microsoft/playwright-browsers/commit/05a25ef993ff70d6f67609f7d94b0ac795f0f36b. Build has full platform coverage - check that all tests pass there.

[github-actions]

Test results for "MCP"

8577 passed, 1446 skipped

---

Merge workflow run.

[github-actions]

Test results for "tests 1"

2 failed
❌ [installation tests] › playwright-cdn.spec.ts:43 › playwright cdn failover should work (https://cdn.playwright.dev/dbazure/download/playwright) @package-installations-macos-latest
❌ [installation tests] › playwright-cdn.spec.ts:43 › playwright cdn failover should work (https://playwright.download.prss.microsoft.com/dbazure/download/playwright) @package-installations-macos-latest

3 flaky

⚠️ [chromium-library] › library/browsercontext-page-event.spec.ts:173 › should work with Ctrl-clicking `@chromium-ubuntu-22.04-arm-node20`
⚠️ [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`

51937 passed, 1247 skipped

---

Merge workflow run.

[github-actions]

🟢 Not this PR — the CDN failover test is red on main too

Hi, I'm the Playwright bot and I triaged the red CI here.

Both failures are installation tests › playwright-cdn.spec.ts:43 › playwright cdn failover should work on package-installations-macos-latest. The roll is a red herring: Chromium r1246 downloads fine in the failing log — it's the WebKit v2364 download that never completes. Same failure on main SHAs that still carry r1245.

Details

Pre-existing / infra

• [installation tests] › playwright-cdn.spec.ts:43 › playwright cdn failover should work (…cdn.playwright.dev… / …playwright.download.prss.microsoft.com…) — npx playwright install exits 1. The stdio shows the roll's own artifacts landing without trouble:

  Chrome for Testing 154.0.8037.0 (playwright chromium v1246) downloaded to …/chromium-1246
  Chrome Headless Shell 154.0.8037.0 (playwright chromium-headless-shell v1246) downloaded to …
  Firefox 155.0 (playwright firefox v1548) downloaded to …
  Downloading WebKit 26.6 (playwright webkit v2364) from https://cdn.playwright.dev/…/webkit-mac-26-arm64.zip
  Downloading WebKit 26.6 (playwright webkit v2364) from https://playwright.download.prss.microsoft.com.does-not-resolve.playwright.dev/…
  

  The run dies on WebKit — a revision this PR doesn't touch — after the failover host (deliberately unresolvable, that's the point of the test) is tried. Byte-identical stdio on main, only with chromium v1245 in place of v1246.

  Same two tests failing where this PR can't be responsible:

  run	branch / PR	sha	bot	cdn tests failed
  35252615324	main	8bb2c097	macos-latest	2/7
  35252655560	main	8bb2c097	windows-latest	2/7
  35248755943	main	24b69326	ubuntu-latest	2/7
  35238682839	main	bf9d04f2	windows-latest	2/7
  35252759302	feat(screencast): style action decorations, keep cursor visible #42758	379bc114	macos-latest	2/7
  35242918717	feat(video): allow recording video at a custom fps #42752	b0447581	windows-latest	2/7

  It's not macOS-specific either — it lands on whichever OS bot draws the short straw, which is the shape of a CDN/network problem rather than a code one. The last fully green stretch for this file is around f4244842 (09-16 23:16) and earlier.

Everything else

The 3 flaky results (Ctrl-click page event on Chromium, third-party Partitioned; cookies on Firefox) all passed on retry and are long-standing regulars; nothing there points at r1246.

The earlier "tests 2" report on this PR — all of library/coverage.spec.ts on the tracing-* bots — was triaged separately and is likewise pre-existing.

Verified against the aggregated CI results DB, topped up to include this PR's runs.

_{Triaged by the Playwright bot - agent run}

[github-actions]

Test results for "tests 2"

39 failed
❌ [chromium-library] › library/coverage.spec.ts:34 › should collect istanbul coverage into the trace @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:55 › should collect coverage per trace chunk @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:81 › should report maps once and counters incrementally @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:109 › should accumulate counters across pulls and keep never hit files @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:135 › should collect coverage of a page closed by in-page script @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:157 › should not double count a stash picked up twice @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:179 › should discard stashes of other sessions @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:199 › should collect coverage of an origin left without a page @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:229 › should pull counters as the actions go @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:246 › should not collect coverage without the option @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:259 › should count only the hits after start @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:276 › should stop collecting when tracing stops @tracing-chromium
❌ [chromium-library] › library/coverage.spec.ts:293 › should surface a failure to stash the coverage @tracing-chromium
❌ [firefox-library] › library/coverage.spec.ts:34 › should collect istanbul coverage into the trace @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:55 › should collect coverage per trace chunk @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:81 › should report maps once and counters incrementally @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:109 › should accumulate counters across pulls and keep never hit files @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:135 › should collect coverage of a page closed by in-page script @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:157 › should not double count a stash picked up twice @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:179 › should discard stashes of other sessions @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:199 › should collect coverage of an origin left without a page @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:229 › should pull counters as the actions go @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:246 › should not collect coverage without the option @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:259 › should count only the hits after start @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:276 › should stop collecting when tracing stops @tracing-firefox
❌ [firefox-library] › library/coverage.spec.ts:293 › should surface a failure to stash the coverage @tracing-firefox
❌ [webkit-library] › library/coverage.spec.ts:34 › should collect istanbul coverage into the trace @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:55 › should collect coverage per trace chunk @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:81 › should report maps once and counters incrementally @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:109 › should accumulate counters across pulls and keep never hit files @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:135 › should collect coverage of a page closed by in-page script @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:157 › should not double count a stash picked up twice @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:179 › should discard stashes of other sessions @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:199 › should collect coverage of an origin left without a page @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:229 › should pull counters as the actions go @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:246 › should not collect coverage without the option @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:259 › should count only the hits after start @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:276 › should stop collecting when tracing stops @tracing-webkit
❌ [webkit-library] › library/coverage.spec.ts:293 › should surface a failure to stash the coverage @tracing-webkit

39 flaky

⚠️ [chromium-page] › page/workers.spec.ts:63 › should have timestamp on worker console messages `@msedge-dev-windows-latest`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:373 › should produce network events, routing, and annotations for Service Worker `@chromium-macos-15-large`
⚠️ [chromium-library] › library/chromium/oopif.spec.ts:179 › should take screenshot `@chromium-macos-15-xlarge`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:213 › should intercept service worker requests (main and within) `@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:110 › selector generator › should use description from aria-describedby `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:165 › selector generator › should try to improve text by shortening `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:356 › selector generator › should use nested ordinals `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:422 › selector generator › should prioritize attributes correctly › role `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:467 › selector generator › should match in deep shadow dom `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:703 › selector generator › should generate noText: description from external aria-describedby `@chrome-macos-latest`
⚠️ [chromium-library] › library/selectors-register.spec.ts:29 › should work `@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/inspector/cli-codegen-csharp.spec.ts:208 › should print context options method override in xunit if options were passed `@firefox-macos-15-large`
⚠️ [firefox-library] › library/inspector/cli-codegen-java.spec.ts:125 › should print a valid basic program in junit `@firefox-macos-15-large`
⚠️ [firefox-library] › library/inspector/cli-codegen-javascript.spec.ts:51 › should work with --http-credentials `@firefox-macos-15-large`
⚠️ [firefox-library] › library/trace-viewer.spec.ts:1915 › should not leak recorders `@firefox-macos-15-large`
⚠️ [firefox-page] › page/page-goto.spec.ts:90 › should work with Cross-Origin-Opener-Policy `@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-reuse.spec.ts:200 › reuse connect › should not cache resources `@firefox-windows-latest`
⚠️ [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/trace-viewer.spec.ts:1915 › should not leak recorders `@firefox-macos-15-xlarge`
⚠️ [webkit-library] › library/playwright-client.spec.ts:26 › should connect from a page and drive the same browser `@tracing-webkit`
⚠️ [webkit-page] › page/page-autowaiting-basic.spec.ts:79 › should await form-post on click `@tracing-webkit`
⚠️ [webkit-library] › library/defaultbrowsercontext-1.spec.ts:48 › context.addCookies() should work `@webkit-windows-latest`
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1695 › should highlight locator in iframe while typing `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1987 › canvas disabled title `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1997 › canvas clipping `@webkit-macos-15-xlarge`
⚠️ [webkit-page] › page/page-screenshot.spec.ts:356 › page screenshot › should work for canvas `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/browsertype-connect.spec.ts:813 › launchServer › should upload a folder `@webkit-macos-15-large`
⚠️ [webkit-library] › library/browsertype-connect.spec.ts:288 › run-server › should send default User-Agent and X-Playwright-Browser headers with connect request `@webkit-macos-15-large`
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1915 › should not leak recorders `@webkit-macos-15-large`
⚠️ [android-page] › page/page-wait-for-navigation.spec.ts:249 › should fail when frame detaches

111775 passed, 4739 skipped

---

Merge workflow run.

[github-actions]

🟢 Not this PR — coverage.spec.ts is red on main too

Hi, I'm the Playwright bot and I triaged the red CI here.

All 39 failures in the latest "tests 2" report are one story: every test in library/coverage.spec.ts fails on the three tracing-* bots with Error: tracing.start: Tracing has been already started. The same 39 failures land on main SHAs that predate this roll, and a Chromium binary bump can't explain identical failures under Firefox and WebKit.

Details

The diff is two lines in packages/playwright-core/browsers.json — chromium and chromium-headless-shell from r1245 to r1246. No product code, so the blast radius is Chromium behaviour and browser download/install.

Pre-existing / infra

• [chromium-library|firefox-library|webkit-library] › library/coverage.spec.ts — all 13 tests × 3 browsers, on tracing-chromium / tracing-firefox / tracing-webkit, every one with Error: tracing.start: Tracing has been already started. The tracing-* bots already start tracing for the run and these tests call context.tracing.start({ coverage: true }) themselves, so the file fails deterministically in that mode — not a flake, a missing guard.

  From the results DB (topped up to include this PR's runs), same file in "tests 2":

  run	branch / PR	sha	failed / passed
  35252655589	main	8bb2c097	39 / 208
  35252615395	main	8bb2c097	39 / 221
  35248755916	main	24b69326	39 / 221
  35238682759	main	bf9d04f2 (this PR's base)	39 / 221
  35195191888	main	f1ea64bd	39 / 221
  35161427909	main	f4244842	39 / 221
  35245460369	this PR	60621bc9	39 / 221

  The counterpart "tests 1" run on each of those SHAs — including this PR's 35245460423 — has the same file fully green (104 passed, 0 failed), which is what makes the red workflow-specific rather than change-specific.

Everything else

The 39 flaky results all passed on retry — third-party Partitioned; cookies on Firefox, trace-viewer canvas and screenshot on WebKit, service-worker interception and selector-generator on Chromium. The usual regulars; nothing there points at r1246.

The earlier "tests 1" report on this PR (playwright-cdn.spec.ts:43 › playwright cdn failover should work) is also not the roll — the failing log downloads chromium v1246 fine and dies on the WebKit v2364 fetch, and the same two tests are red on main at 8bb2c097, 24b69326 and bf9d04f2.

Report: tests 2 merge run 35261932458.

_{Triaged by the Playwright bot - agent run}