feat(firefox): roll to r1552

[microsoft-playwright-automation]

Browser build: https://github.com/microsoft/playwright-browsers/commit/83e9965ae0195faec599765937c4e0f1cd69177b. Build has full platform coverage - check that all tests pass there.

[github-actions]

Test results for "tests 1"

4 flaky

⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@frozen-time-library-chromium-linux`
⚠️ [chromium-library] › library/popup.spec.ts:260 › should not throw when click closes popup `@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`

52300 passed, 1243 skipped

---

Merge workflow run.

[github-actions]

Test results for "MCP"

3 failed
❌ [chrome] › mcp/http.spec.ts:624 › should close session when heartbeat ping is not answered @mcp-windows-latest-chrome
❌ [chromium] › mcp/webmcp-dynamic.spec.ts:189 › a tool registered in an iframe can be called after the page is reloaded @mcp-macos-latest-chromium
❌ [firefox] › mcp/cli-core.spec.ts:57 › click link @mcp-windows-latest-firefox

8761 passed, 1480 skipped

---

Merge workflow run.

[github-actions]

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

🟡 Two failures are known flakes; one is very likely unrelated but I couldn't prove it

This PR only touches Firefox (Juggler PageAgent.js keydown handling on macOS plus the r1552 roll). None of the three MCP failures looks caused by it, but the Chrome heartbeat test has no failure history I could point to.

Details

Overall: the diff changes Firefox key input on macOS (Services.appinfo.OS === 'Darwin') and bumps the Firefox revision. Two of the failures run on Chromium/Chrome, which never load Juggler. The Firefox failure is on Windows, where the new code path is skipped. The tests 1 report shows only flaky tests, no failures.

Pre-existing flake / infra

• [firefox] › mcp/cli-core.spec.ts:57 › click link (mcp-windows-latest-firefox) is a known flake. In the test-results DB it failed in 9 of 725 runs and a retry rescued it 3 more times, always on mcp-windows-latest-firefox with the same Expected substring: "### Page - Page URL: …" error. That includes 4 runs on main (2026-08-19, 08-20, 09-18, 09-25) and unrelated PRs chore(locators): rewrite locator parser with per-language parsers #42895 and chore(server): simplify action helper signatures #42904. It clicks a link, which doesn't go through the keydown path changed here, and the change is macOS-only anyway.
• [chromium] › mcp/webmcp-dynamic.spec.ts:189 › a tool registered in an iframe can be called after the page is reloaded (mcp-macos-latest-chromium) is a known flake. It's a new test with 44 runs so far: it failed on chromium in feat(chromium): roll to r1247 #42915 (Chromium roll), failed once on chrome, and a retry rescued it once. fix(mcp): rebind page-registered WebMCP tools when the tab or frame changes #42821 also failed it on Firefox with the same toEqual deep-equality error. This PR has no effect on Chromium.

Uncertain

• [chrome] › mcp/http.spec.ts:624 › should close session when heartbeat ping is not answered (mcp-windows-latest-chrome): 0 failures in 737 chrome runs in the DB. The only related signal is that retries rescued the same test once each on firefox and webkit, which suggests it's timing-sensitive, but it isn't the same project. It tests the MCP HTTP server's heartbeat on Chrome, which a Firefox-only change can't reach, so I'm confident it's unrelated. To call it a flake, though, I'd need a rerun of the MCP job to come back green, or another chrome failure of this test. (My DB refresh hit a GitHub API 500, so this PR's own runs aren't in the snapshot.)

_{Triaged by the Playwright bot - agent run}

[github-actions]

Test results for "tests 2"

2 failed
❌ [firefox-library] › library/inspector/cli-codegen-aria.spec.ts:87 › should update aria snapshot highlight @firefox-macos-15-large
❌ [android-page] › page/page-set-content.spec.ts:57 › should include shadow roots

33 flaky

⚠️ [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/browsercontext-user-agent.spec.ts:110 › should work for navigator.userAgentData and sec-ch-ua headers `@msedge-windows-latest`
⚠️ [chromium-library] › library/video.spec.ts:762 › screencast › should work with video+trace `@chromium-windows-latest`
⚠️ [chromium-library] › library/beforeunload.spec.ts:20 › should close browser with beforeunload page `@chromium-macos-15-large`
⚠️ [chromium-library] › library/browsercontext-basic.spec.ts:36 › should be able to click across browser contexts `@chromium-macos-15-large`
⚠️ [chromium-library] › library/browsercontext-device.spec.ts:33 › device › should support clicking `@chromium-macos-15-large`
⚠️ [chromium-library] › library/browsercontext-events.spec.ts:30 › console event should work with element handles `@chromium-macos-15-large`
⚠️ [chromium-library] › library/chromium/chromium.spec.ts:213 › should intercept service worker requests (main and within) `@chromium-macos-15-large`
⚠️ [chromium-library] › library/trace-viewer.spec.ts:1934 › should not leak recorders `@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:179 › serviceWorker(), and fromServiceWorker() work `@chrome-macos-latest`
⚠️ [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:683 › selector generator › should generate noText: name from aria-label `@chrome-macos-latest`
⚠️ [chromium-library] › library/video.spec.ts:152 › screencast › should continue recording main page after popup closes `@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-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/signals.spec.ts:25 › should close the browser when the node process closes `@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/trace-viewer.spec.ts:1714 › should highlight locator in iframe while typing `@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-library] › library/tracing.spec.ts:533 › should produce screencast frames scale `@webkit-macos-15-xlarge`
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1934 › should not leak recorders `@webkit-macos-15-large`
⚠️ [android-page] › page/locator-click.spec.ts:20 › should work Radoslav Kirilov (@smoke)
⚠️ [android-page] › page/page-goto.spec.ts:481 › should disable timeout when its set to 0
⚠️ [android-page] › page/page-network-request.spec.ts:28 › should work for main frame navigation request
⚠️ [android-page] › page/page-request-fulfill.spec.ts:81 › should fulfill with unuassigned status codes
⚠️ [android-page] › page/selectors-frame.spec.ts:203 › should click in lazy iframe

112505 passed, 4782 skipped

---

Merge workflow run.

[github-actions]

🟢 Failures look unrelated to this PR

Hi, I'm the Playwright bot and I took a first look at the CI failures. Both failing tests also fail on main and on unrelated PRs, so this Firefox roll looks clear.

Details

This PR rolls Firefox to r1552 and changes PageAgent.js to suppress text input for Option+single-character keydowns with empty text on macOS. Neither failure goes through that code path, and both already fail without this PR.

Pre-existing flake / infra

• [firefox-library] › library/inspector/cli-codegen-aria.spec.ts:87 › should update aria snapshot highlight on firefox-macos-15-large: pre-existing flake. In the test-results DB, on this bot it finished red in 17 of 309 runs and was rescued by a retry in 44 more. Those runs include main (e.g. runs 36118130261, 36079365114, 36076490341) and PRs feat(chromium): roll to r1243 #42434, feat(firefox): roll to r1549 #42767, feat(chromium): roll to r1241 #42340, fix(android): include the from point in the swipe path #42349, feat(webkit): roll to r2357 #42437 and feat(chromium): roll to r1247 #42915. It fails the same way each time: expect(locator('x-pw-highlight')).toBeVisible() times out. It passes every time on the other Firefox bots. The test types with press('Backspace') (a multi-character key name) and pressSequentially('"Cancel"'), which produces text. Neither hits the new !text && [...key].length === 1 branch.
• [android-page] › page/page-set-content.spec.ts:57 › should include shadow roots: already broken before this PR. It failed in 46 of 46 runs in the DB, on main and on PRs feat(webkit): roll to r2366 #42879, feat(webkit): roll to r2367 #42898 and feat(chromium): roll to r1247 #42915. This PR only touches Firefox, and Android runs Chromium.

_{Triaged by the Playwright bot - agent run}