feat(firefox): roll to r1548

[microsoft-playwright-automation]

Browser build: https://github.com/microsoft/playwright-browsers/commit/2c149e66f5db026abc96f9dbbff922708b24c045. Build has full platform coverage - check that all tests pass there.

[github-actions]

Test results for "tests 1"

1 failed
❌ [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open @firefox-ubuntu-22.04-node20

9 flaky

⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@frozen-time-library-chromium-linux`
⚠️ [chromium-library] › library/video.spec.ts:356 › screencast › should work for popups `@frozen-time-library-chromium-linux`
⚠️ [chromium-library] › library/browsercontext-fetch.spec.ts:1333 › should abort requests when browser context closes `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:664 › screencast › should capture full viewport `@realtime-time-library-chromium-linux`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:373 › should produce network events, routing, and annotations for Service Worker `@chromium-ubuntu-22.04-node24`
⚠️ [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`
⚠️ [playwright-test] › ui-mode-trace.spec.ts:388 › should reveal errors in the sourcetab `@windows-latest-node22`

51718 passed, 1247 skipped

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Merge workflow run.

[github-actions]

🟢 The one failure is pre-existing — this PR is clear

Hi, I'm the Playwright bot and I triaged the failing CI run.

browsercontext-storage-state.spec.ts:453 is already broken on main, including this PR's own base commit 18205280, with a byte-identical error. Nothing in the roll is responsible.

Details

Pre-existing flake / infra

• [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open — this test is red almost everywhere, not just here. In the aggregated CI results it failed 49 of its last 50 runs (2026-09-10 → 2026-09-16), across main pushes and unrelated PRs (feat(webkit): roll to r2363 #42737 webkit roll, test: evaluate() with falsy result #42728, feat(coverage): experimental istanbul coverage collection via tracing #42684, Fix spelling of restoring in credentials docs #42718, chore(trace): split actions and context options into separate files #42654 …). Crucially it fails on main at 18205280, which is the base of this PR, with the same assertion:

  expect(received).toEqual(expected)
  + Object { "name": "fromServiceWorker", "value": "yes" }
  

  The single green run in the window is branch ff-fix-42656 (2ada08e3), which looks like the in-flight fix for it. This is a consistently broken test, not a flake and not a regression from r1548.

Caused by this PR

• None.

The 9 flaky results all passed on retry and are outside the scope of this verdict.

_{Triaged by the Playwright bot - agent run}

[github-actions]

Test results for "MCP"

2 failed
❌ [firefox] › mcp/annotate.spec.ts:137 › should abort MCP annotation when last screenshot is removed @mcp-windows-latest-firefox
❌ [webkit] › mcp/cli-killall.spec.ts:42 › kill-all kills filtered dashboard pid @mcp-windows-latest-webkit

8562 passed, 1446 skipped

---

Merge workflow run.

[github-actions]

🟢 All three failures are pre-existing — the roll is clear

Hi, I'm the Playwright bot and I triaged the failing CI runs.

Both MCP failures are known flakes that fail with byte-identical errors on main at SHAs long before this roll, and the firefox-library storage-state failure is already broken on main (33 of its last 34 runs, most recently today). Nothing here points at Firefox r1548.

Details

This PR changes only the Firefox build: NetworkRequest._releaseReferences() in juggler/NetworkObserver.js, a proto-chain fix in juggler/content/Runtime.js::getObjectProperties, and the browsers.json revision bump. None of the three failing tests exercise that code — two are MCP UI/CLI tests (one of them WebKit-only), and the third predates the roll on main.

Pre-existing flake / infra

• [firefox] › mcp/annotate.spec.ts:137 › should abort MCP annotation when last screenshot is removed @mcp-windows-latest-firefox — flaky, 8 failed of 696 runs (1.1%), and Windows-only (0 failures across all macOS and Ubuntu bots). The same expect(locator('.annotate-sidebar-thumb')).toHaveCount(1) / Received: 0 error appears on main at 11ade07c, fa2bfcf4, 03a69df9, bee00ad3, 4acdb2f9, and on unrelated PRs fix(fetch): do not crash on late EPIPE after refused body #42116 and chore(deps): bump the github-actions group with 7 updates #42132. It's a screenshot-thumbnail UI assertion, nothing to do with Juggler networking or getObjectProperties.

• [webkit] › mcp/cli-killall.spec.ts:42 › kill-all kills filtered dashboard pid @mcp-windows-latest-webkit — flaky, 9 failed of 717 runs (1.3%), same expect(received).toBeDefined() / Received: undefined (sometimes as a 60s timeout) on main at 9cee4279, 6748802c, 28b4fea7, and on PRs chore(trace): remove snapshot pointers from action events #42431, fix(trace-viewer): use ToolbarButton for Show all and the console badge #42336, feat(webkit): roll to r2355 #42337, fix(fetch): report security details for resumed TLS sessions #42331, test: setOffline() persists across navigations #42252 — including the WebKit roll feat(webkit): roll to r2355 #42337. This is a WebKit project on a process-management test; a Firefox build bump can't reach it.

• [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open @firefox-ubuntu-22.04-node20 — not a flake, an already-broken test: 33 of 34 recorded runs fail, with failures on main as recent as today, including this PR's base commit 18205280. Pre-existing breakage, not caused by the roll.

_{Triaged by the Playwright bot - agent run}

[github-actions]

Test results for "tests 2"

5 failed
❌ [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open @tracing-firefox
❌ [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open @firefox-macos-15-large
❌ [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open @firefox-windows-latest
❌ [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-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open @firefox-macos-15-xlarge

29 flaky

⚠️ [chromium-library] › library/browsercontext-reuse.spec.ts:361 › reuse launch › should work with routeWebSocket `@chrome-ubuntu-22.04`
⚠️ [chromium-library] › library/browsercontext-reuse.spec.ts:361 › reuse connect › should work with routeWebSocket `@chrome-ubuntu-22.04`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:436 › should produce network events, routing, and annotations for Service Worker (advanced) `@chrome-ubuntu-22.04`
⚠️ [chromium-library] › library/inspector/cli-codegen-2.spec.ts:105 › cli codegen › should upload a single file `@chrome-ubuntu-22.04`
⚠️ [chromium-library] › library/defaultbrowsercontext-1.spec.ts:28 › context.cookies() should work Radoslav Kirilov (@smoke) `@msedge-windows-latest`
⚠️ [chromium-page] › page/workers.spec.ts:63 › should have timestamp on worker console messages `@msedge-windows-latest`
⚠️ [chromium-library] › library/chromium/oopif.spec.ts:179 › should take screenshot `@chromium-macos-14-xlarge`
⚠️ [chromium-library] › library/video.spec.ts:736 › screencast › should work with video+trace `@chromium-macos-14-xlarge`
⚠️ [chromium-library] › library/trace-viewer.spec.ts:1915 › should not leak recorders `@chromium-macos-15-xlarge`
⚠️ [chromium-library] › library/capabilities.spec.ts:477 › should not crash on feature detection for PublicKeyCredential `@chrome-windows-latest`
⚠️ [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-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:70 › selector generator › should not escape spaces inside named attr selectors `@chrome-macos-latest`
⚠️ [chromium-library] › library/selector-generator.spec.ts:556 › selector generator › should generate title selector `@chrome-macos-latest`
⚠️ [electron-page] › page/workers.spec.ts:63 › should have timestamp on worker console messages `@electron-windows-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-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@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-cookies-third-party.spec.ts:257 › third party 'Partitioned;' cookies `@firefox-macos-15-xlarge`
⚠️ [firefox-library] › library/trace-viewer.spec.ts:121 › should show tracing.group in the action list with location `@firefox-macos-15-xlarge`
⚠️ [firefox-library] › library/trace-viewer.spec.ts:1915 › should not leak recorders `@firefox-macos-15-xlarge`
⚠️ [webkit-library] › library/video.spec.ts:113 › screencast › should capture static page `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/capabilities.spec.ts:209 › make sure that XMLHttpRequest upload events are emitted correctly `@webkit-macos-15-large`
⚠️ [android-page] › page/selectors-frame.spec.ts:203 › should click in lazy iframe

111373 passed, 4739 skipped

---

Merge workflow run.

[github-actions]

🟢 Neither failure is caused by this roll

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

Both failing tests are Firefox-only, but neither traces back to r1548: the storage-state one is a known break that fails on main too, and the partitioned-cookie one is a long-standing flake.

Details

This PR only touches NetworkObserver.js (releasing references on finished/redirected requests) and Runtime.js (getObjectProperties rewrite). Neither failure exercises those paths, and both reproduce off this branch.

Pre-existing flake / infra

• [firefox-library] › library/browsercontext-storage-state.spec.ts:453 › should work when service worker is intefering and the origin is not open (4 bots) — pre-existing, and not even flaky: it fails essentially always. In the CI results DB it has 51 failures out of 52 runs since it landed on 2026-09-10, including 60 results on main across 12 different SHAs, zero passes, plus unrelated PRs (feat(webkit): roll to r2362 #42736, test: evaluate() with falsy result #42728, feat(coverage): experimental istanbul coverage collection via tracing #42684, feat(evaluate): opt in to Map and Set serialization #42709, …). The error is stable everywhere — expect(received).toEqual(expected) with an extra fromServiceWorker=yes cookie. The single pass in the whole window is on fix(firefox): use bypassServiceWorker flag for storage state pages #42741 (fix(firefox): use bypassServiceWorker flag for storage state pages), which is still open and not part of this roll.

• [firefox-library] › library/browsercontext-cookies-third-party.spec.ts:470 › top level 'Partitioned;' cookie and same origin iframe (macos-15-xlarge) — classic flake. Over 953 runs it failed 11 times and passed 942, and of those passes 541 were rescued by a retry — it flips verdict constantly across unrelated SHAs going back to 2026-08-03. It also lands in this run's own flaky list on three other Firefox bots, plus its sibling at :257.

No failure in this report needs a change to the roll.

_{Triaged by the Playwright bot - agent run}