Clarification: Third-party browser injection causing modified UI appearance (Chromium-based)

[lancelot2425-tech]

Hi ComfyUI team,

I’d like to report an issue that may cause confusion for users, although it is not a bug in ComfyUI itself.

Summary

Some users may observe unexpected UI elements (non-English menus, “test” or “easter egg” items) when accessing ComfyUI via Chromium-based browsers (Chrome / Edge). After investigation, this behavior is not caused by ComfyUI, but by system-level browser injection.

Verification steps

I performed the following checks:

1. Fetched the raw HTML directly from the backend using:
   curl http://127.0.0.1:8188/
   The returned HTML is minimal and clean, with no injected UI content.

2. Set DOM mutation breakpoints in DevTools.
   No JavaScript runtime insertion occurs.

3. Compared browsers:

• Firefox shows a clean, standard ComfyUI UI.
• Chrome / Edge show injected UI elements.

This strongly indicates a third-party injection affecting Chromium-based browsers only.

Conclusion

The ComfyUI backend and official frontend are confirmed to be clean.
However, users may mistakenly believe ComfyUI is modified or compromised.

Suggestion

It may be helpful to document this scenario (e.g. in troubleshooting or FAQ):

• Recommend testing with Firefox
• Suggest checking for system-level browser injection or security software

I’m reporting this to help prevent future confusion.
Thanks for the great work on ComfyUI.

Screenshot for reference only:

This screenshot shows the unexpected UI elements as rendered in a Chromium-based browser.
The same ComfyUI instance renders clean UI in Firefox.