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feat(firefox): roll Firefox to M155 - #42445

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Andrey Lushnikov (aslushnikov) wants to merge 1 commit into
microsoft:mainfrom
aslushnikov:roll-ff-155
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feat(firefox): roll Firefox to M155#42445
Andrey Lushnikov (aslushnikov) wants to merge 1 commit into
microsoft:mainfrom
aslushnikov:roll-ff-155

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@aslushnikov Andrey Lushnikov (aslushnikov) commented Aug 28, 2026 •
edited by dgozman
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Closes #41356.

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github-actions Bot commented Aug 28, 2026

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Test results for "tests 1"

10 flaky ⚠️ [chromium-library] › library/video.spec.ts:664 › screencast › should capture full viewport `@frozen-time-library-chromium-linux`
⚠️ [chromium-library] › library/video.spec.ts:664 › screencast › should capture full viewport `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:699 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:736 › screencast › should work with video+trace `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/popup.spec.ts:260 › should not throw when click closes popup `@realtime-time-library-chromium-linux`
⚠️ [chromium-library] › library/video.spec.ts:736 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22`
⚠️ [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-emulate-media.spec.ts:144 › should keep reduced motion and color emulation after reload `@firefox-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-goto.spec.ts:90 › should work with Cross-Origin-Opener-Policy `@firefox-ubuntu-22.04-node20`

51243 passed, 1240 skipped

Merge workflow run.

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Test results for "MCP"

7 failed
❌ [chromium] › mcp/clipboard.spec.ts:19 › clipboard write without permission dialog @mcp-macos-latest-chromium
❌ [chromium] › mcp/clipboard.spec.ts:19 › clipboard write without permission dialog @mcp-windows-latest-chromium
❌ [chromium] › mcp/clipboard.spec.ts:19 › clipboard write without permission dialog @mcp-ubuntu-latest-chromium
❌ [firefox] › mcp/annotate.spec.ts:349 › should annotate when context has no fixed viewport @mcp-windows-latest-firefox
❌ [firefox] › mcp/annotate.spec.ts:386 › should cancel browser_annotate when the MCP request is aborted @mcp-windows-latest-firefox
❌ [msedge] › mcp/http.spec.ts:105 › http transport browser lifecycle (isolated) @mcp-windows-latest-msedge
❌ [msedge] › mcp/sse.spec.ts:194 › sse transport browser lifecycle (persistent) @mcp-windows-latest-msedge

8252 passed, 1361 skipped

Merge workflow run.

@dcrousso Devin Rousso (dcrousso) mentioned this pull request Aug 28, 2026
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yury-s
Yury Semikhatsky (yury-s) reviewed Aug 28, 2026
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Comment thread tests/library/har.spec.ts
import { utils } from '../../packages/playwright-core/lib/coreBundle';
const { createHttp2Server } = utils;

const kLoopbackAddress = /^(127\.0\.0\.1|\[::1\]|::1)$/;

@yury-s Yury Semikhatsky (yury-s) Aug 28, 2026

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Firefox is an outlier here, I'm fixing it in juggler: https://github.com/microsoft/playwright-browsers/pull/2501

@dcrousso Devin Rousso (dcrousso) mentioned this pull request Aug 28, 2026
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@yury-s Yury Semikhatsky (yury-s) yury-s left review comments
@dgozman Dmitry Gozman (dgozman) dgozman approved these changes

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