### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/main/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/main/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a bug report that matches the one I want to file, without success.

### Electron Version

16.0.3

### What operating system are you using?

Windows

### Operating System Version

Windows 10 version 1803

### What arch are you using?

x64

### Last Known Working Electron version

16.0.3

### Expected Behavior

view.setBackgroundColor("#FF000000")

### Actual Behavior

The background color is transparent

### Testcase Gist URL

_No response_

### Additional Information

MacOS is work
Windows is not work.
shell/browser/api/electron_api_web_contents.cc
ontents()->SetUserAgentOverride(
      blink::UserAgentOverride::UserAgentOnly(user_agent), false);
}
std::string WebContents::GetUserAgent() {
  return ontents()->GetUserAgentOverride().ua_string_override;
}
v8::Local<v8::Promise> WebContents::SavePage(
    const base::FilePath& full_file_path,
    const content::SavePageType& save_type) {
  v8::Isolate* isolate = JavascriptEnvironment::GetIsolate();
  gin_helper::Promise<void> promise(isolate);
  v8::Local<v8::Promise> handle = promise.GetHandle();
  if (!full_file_path.IsAbsolute()) {
    promise.RejectWithErrorMessage("Path must be absolute");
    return handle;
  }
  auto* handler = new SavePageHandler(ontents(), std::move(promise));
  handler->Handle(full_file_path, save_type);
  return handle;
}
void WebContents::OpenDevTools(gin::Arguments* args) {