fix: add noopener to pop-out window

[carochacs]

Summary

Add noopener flag to window.open() call in the pop-out panel feature to prevent the popup from retaining a window.opener reference back to the main window (issue #25).

Changes

• File: screen.js:3174
• Fix: Added noopener to the window features string: 'popup,width=1280,height=420,noopener'
• Impact: Reduces blast radius of potential XSS exploits in the pop-out window

Security Context

The pop-out URL is always same-origin and fully constructed from trusted values (window.location.origin), so this is not independently exploitable today. However, it's a defense-in-depth improvement that aligns with the plugin's documented invariant ("No window.opener use") and hardens against future vulnerabilities.

Closes #25

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[deepsource-io]

DeepSource Code Review

We reviewed changes in 2c2317f...babc67b on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
JavaScript		Aug 15, 2026 6:49p.m.	Review ↗
Shell		Aug 15, 2026 6:49p.m.	Review ↗

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[pullfrog]

Caution

This change breaks the pop-out feature entirely. noopener in the window.open features string makes the call return null even when the popup opens successfully, so the if (!popup) guard always fires and the pop-out path never completes.

Reviewed changes

• screen.js popOutPanel(): appends noopener to the window.open features string to sever the popup's window.opener reference (issue #25). Because the noopener feature makes window.open return null, the existing if (!popup) check at screen.js:3175 now always triggers, and the function returns before removing the panel, registering the popup in popups, or starting the broadcaster.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using Big Pickle (free) ｜ 𝕏}

[pullfrog]

ℹ️ No new issues in this delta — one commit-hygiene nit.

Reviewed changes (delta against the prior review, which covered dd08def)

• plugin.json: bumps version from 1.14.2 to 1.14.3 ahead of the security fix.

The critical finding from the prior review — the noopener change breaking pop-out — is unaffected by this commit and still stands. Note that a 1.14.3 release built from this branch would ship the broken pop-out.

ℹ️ Nitpicks

• Commit 6d164ff uses the placeholder message "x" — worth rewriting to something descriptive (e.g. "chore: bump version to 1.14.3") before merge, especially since it will be the version-bump commit on a released tag.

  ^{｜ Fix it ➔ ｜ View workflow run ｜ Using Big Pickle (free) ｜ 𝕏}

[pullfrog]

Important

The revert in babc67b correctly un-breaks pop-out, but it leaves this PR with no functional change: the only net diff is the plugin.json version bump, and the body still declares "Closes #25". Merging now would auto-close the open security issue without shipping a fix and publish a 1.14.3 that is behaviorally identical to 1.14.2.

Reviewed changes — Delta since the prior pullfrog review (at 6d164ff): the author reverted the noopener change and rewrote the version-bump commit message.

• Reverted the noopener change (babc67b): popOutPanel()'s window.open call is back to 'popup,width=1280,height=420' with no noopener, so the if (!popup) guard stops always firing and pop-out — popup registration, time-sync broadcasting, reaping, and dock-back — is restored. This addresses the critical finding from the initial review (thread resolved).
• Rewrote the version-bump commit message (6d164ff): subject is now chore: bump version to 1.14.3 for security fix instead of the "x" placeholder, addressing the prior delta-review nitpick.

⚠️ Merging now would auto-close #25 while shipping no fix

With the noopener change reverted, the base-to-head diff is only the plugin.json version bump (1.14.2 → 1.14.3). The PR body still ends with "Closes #25", so merging would close the still-open bug+security issue #25 as "fixed" without any fix landing, and publish a 1.14.3 with no behavioral difference from 1.14.2.

Technical details

# Decide the PR's fate before merge

## Affected sites
- plugin.json:4 — the only net change; a version bump with no accompanying fix.
- PR body "Closes #25" — auto-closes issue #25 (still open, labeled bug+security) on merge, with the fix reverted.

## Required outcome
- Either (a) close this PR without merging and keep #25 open, or (b) land a real fix. If opener severing is still wanted, the viable form is `const popup = window.open(...); popup.opener = null;` — it keeps the WindowProxy reference that `popups.set` (screen.js:3181) and the `popup.closed` reap loop (screen.js:3699) require. The `noopener` features flag is not usable here: it returns `null` on every successful open (HTML spec "window open steps"), which is exactly the breakage the revert just removed.
- If the PR is closed, the version bump goes with it.

  ^{｜ Fix it ➔ ｜ View workflow run ｜ Using Big Pickle (free) ｜ 𝕏}

[carochacs]

Closing as not applicable.

Issue #25 (window.opener XSS) requires same-origin pop-out windows with active .opener exploitation. While this code does open same-origin popups, it contains no .opener references in either the main window or the popup window — there is no code path to exploit.

The attempted fix (adding noopener feature to window.open()) makes the function return null per HTML spec, breaking the entire pop-out feature since line 3175 checks if (!popup) and bails. This regresses core functionality without addressing a real vulnerability in this codebase.

Conclusion: The security concern doesn't apply to this code. The pop-out feature is safer as-is (same-origin, no .opener references) than with noopener (which sacrifices functionality).

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Generated by Claude Code