ctrl s cant't work

### Prerequisites

- [x] I am running the latest version of ComfyUI
- [ ] I have custom nodes enabled

### What happened?

ctrl s cant't work
firefox browser can't work also
[comfyui log.txt](https://github.com/user-attachments/files/31349245/comfyui.log.txt)

https://github.com/user-attachments/assets/1d0cd4b0-b9cf-4956-a8e8-2050cb7bbdff

### Steps to Reproduce

1.ctrl+s in a workflow

### Workflow

anyone

### How is this affecting you?

Visual/UI issue only

### ComfyUI Frontend Version

ComfyUI_frontend v1.50.6

### Browser

Other

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_

Start by reproducing Ctrl+S in an arbitrary workflow, especially in Firefox, and review the attached log and recording for the failure details. Compare the behavior across browsers and use the frontend's workflow save handling as the entry point. Done means Ctrl+S saves the workflow reliably without the reported visual/UI issue.

Written by the indexing model from the issue text.