CoreServer: Fix Arc can't get every window

[ndelangen]

What I did

Fix a bug where the applescript tries to get work on Arc, but that does not work.

I removed Arc from the list of browser to try the applescript method.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

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core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=<PR_NUMBER>

Summary by CodeRabbit

• Chores
  • Adjusted macOS browser integration: Arc is no longer targeted for automatic tab reuse when opening the app. Other Chromium-based browsers remain supported for reusing an existing tab.
  • Users on macOS using Arc may notice the app opens in a different browser or a new window instead of reusing an Arc tab.

[coderabbitai]

Walkthrough

Removed "Arc" from the Chromium-based browsers list used by the macOS AppleScript path in startBrowserProcess, narrowing the set of browsers checked for tab reuse. No other logic, exports, or control flow changed.

Changes

Cohort / File(s)	Summary
Open-browser macOS AppleScript targets code/core/src/core-server/utils/open-browser/opener.ts	Deleted "Arc" from supportedChromiumBrowsers used by the AppleScript-driven tab reuse loop; no other edits.

Sequence Diagram(s)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• Dev: Improve the browser opening experience #32488 — Touches the same macOS AppleScript-based opener logic, adding the AppleScript and implementation that this PR adjusts.

Suggested labels

maintenance, ci:normal

Suggested reviewers

• kasperpeulen
• yannbf

Poem

I nudge the tabs, hop-light, hop-bright—
One fewer burrow in the Chromium night.
Arc bows out; the script stays keen,
Fewer doors, same tidy scene.
Thump-thump—review’s a nibble, not a bite! 🐇✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title "CoreServer: Fix Arc can't get every window" is concise, focused on a single bug, and directly reflects the primary change in the PR (removing Arc from the macOS AppleScript browser list), so it conveys the main intent clearly to reviewers.

✨ Finishing touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch norbert/remove-arc-special-open-script-support

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 795e05c and 287e6bc.

📒 Files selected for processing (1)

• code/core/src/core-server/utils/open-browser/opener.ts (0 hunks)

💤 Files with no reviewable changes (1)

• code/core/src/core-server/utils/open-browser/opener.ts

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: Core Unit Tests, windows-latest

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 287e6bc

Command	Status	Duration	Result
nx run-many -t check -c production --parallel=7	✅ Succeeded	1m 22s	View ↗
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☁️ Nx Cloud last updated this comment at 2025-09-22 13:20:36 UTC

[storybook-app-bot]

Package Benchmarks

^{Commit: 287e6bc, ran on 22 September 2025 at 13:29:23 UTC}

The following packages have significant changes to their size or dependencies:

@storybook/nextjs

	Before	After	Difference
Dependency count	529	529	0
Self size	939 KB	939 KB	🚨 +126 B 🚨
Dependency size	58.64 MB	58.25 MB	🎉 -387 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/svelte-vite

	Before	After	Difference
Dependency count	22	19	🎉 -3 🎉
Self size	59 KB	59 KB	0 B
Dependency size	26.89 MB	26.78 MB	🎉 -119 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/sveltekit

	Before	After	Difference
Dependency count	23	20	🎉 -3 🎉
Self size	49 KB	49 KB	🚨 +30 B 🚨
Dependency size	26.95 MB	26.84 MB	🎉 -119 KB 🎉
Bundle Size Analyzer	Link	Link