[Dmitry Gozman (dgozman)]

Summary

• Max-Age now takes precedence over Expires in Set-Cookie regardless of attribute order, per RFC 6265 §5.3.
• A Max-Age value that is not an integer (e.g. 10abc) is now ignored, per RFC 6265 §5.2.2.

Fixes #43077

[github-actions]

Test results for "MCP"

3 failed
❌ [chrome] › mcp/session-log.spec.ts:87 › session log should recover after write failure @mcp-macos-latest-chrome
❌ [firefox] › mcp/annotate.spec.ts:446 › should switch screencast to -s session on show --annotate @mcp-windows-latest-firefox
❌ [firefox] › mcp/cli-core.spec.ts:57 › click link @mcp-windows-latest-firefox

9032 passed, 1495 skipped

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Merge workflow run.

[github-actions]

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

🟡 One failure is uncertain; two are confirmed pre-existing flakes

The cookie parsing change does not reach these MCP tests, so the failures look unrelated to this PR. However, I could not find the same session-log.spec.ts test failing on another SHA, so it remains uncertain under the CI triage criteria.

Details

This PR only changes cookieStore.ts and global-fetch-cookie.spec.ts. None of the failing tests exercise cookie parsing or the global fetch cookie jar.

Uncertain

• [chrome] › mcp/session-log.spec.ts:87 › session log should recover after write failure (@mcp-macos-latest-chrome) — timed out after the MCP connection closed. The signature and unrelated code path lean toward a flake, but I found no prior failure of this exact test on an unrelated SHA. A matching failure elsewhere is needed to classify it as pre-existing.

Pre-existing flake / infra

• [firefox] › mcp/annotate.spec.ts:446 › should switch screencast to -s session on show --annotate (@mcp-windows-latest-firefox) — the same test failed in unrelated feat(trace-viewer): render action point and target box in aria mode #42230 (run); prior CI history recorded 87 failures in 8,485 runs.
• [firefox] › mcp/cli-core.spec.ts:57 › click link (@mcp-windows-latest-firefox) — the same test also failed in unrelated feat(trace-viewer): render action point and target box in aria mode #42230 (run); prior CI history recorded 21 failures in 8,486 runs.

_{Triaged by the Playwright bot - agent run}