Bug: "Focus Mode(F)" Front-end performance is abnormal

[zade23]

Prerequisites

• I am running the latest version of ComfyUI
• I have searched existing issues to make sure this isn't a duplicate
• I have tested with all custom nodes disabled (see how)

What happened?

In version 1.25, focus mode works correctly when the gallery and command line windows are open.
In version 1.26, the gallery and command line windows cannot be popped back.

Not sure if it's a problem on my machine.

Video

20250918184428_rec_-convert.mp4

version: ComfyUI_frontend v1.25.11

20250918194709_rec_-convert.mp4

version: ComfyUI_frontend v1.26.11

Steps to Reproduce

1. comfy launch , Front-end version: 1.26.11
2. Predd keyboard "F" or UI button "💡Focus mode(f)"

How is this affecting you?

Crashes ComfyUI completely

ComfyUI Frontend Version

1.26.11

Browser

Chrome/Chromium

Console Errors

Logs

Additional Context

No response

┆Issue is synchronized with this Notion page by Unito

[dosubot]

Hi @zade23! I'm Dosu and I’m helping the ComfyUI_frontend team.

This Focus Mode regression in v1.26.11—where the gallery and command line windows can't be restored and the UI crashes—matches symptoms seen in other recent frontend issues, especially on Chrome/Chromium. There are no direct duplicates or official fixes yet, but similar problems have been linked to frontend state management bugs and recent layout refactors. Common causes include Chrome extensions (like Tampermonkey), browser cache, non-default font sizes, and Chrome fingerprinting protection. Workarounds that have helped others: disable all browser extensions, clear cache, reset Chrome font size to Medium, check DevTools Console/Network for errors, and try Firefox or Edge to see if the issue persists. Maintainers are aware of ongoing frontend regressions and are working on improvements, but for now, these steps may help isolate or temporarily resolve the problem. More details and troubleshooting steps are discussed in this related thread.

To reply, just mention @dosu.

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