### 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

17.0.0

### What operating system are you using?

Windows

### Operating System Version

Windows 10 Version 21H1

### What arch are you using?

x64

### Last Known Working Electron version

14.2.3

### Expected Behavior

background should transparent if background is #00000000

### Actual Behavior

has a white background

### Testcase Gist URL

_No response_

### Additional Information

_No response_
shell/browser/api/electron_api_web_contents.cc
Window is already in fullscreen mode, save the state.
  if (enter_fullscreen && owner_window_->IsFullscreen()) {
    native_fullscreen_ = true;
    UpdateHtmlApiFullscreen(true);
    return;
  }
   Exit html fullscreen state but not window's fullscreen mode.
  if (!enter_fullscreen && native_fullscreen_) {
    UpdateHtmlApiFullscreen(false);
    return;
  }
   Set fullscreen on window if allowed.
  auto* web_preferences = WebContentsPreferences::From(GetWebContents());
  bool html_fullscreenable =
      web_preferences
          ? !web_preferences->ShouldDisableHtmlFullscreenWindowResize()
          : true;
  if (html_fullscreenable) {
    owner_window_->SetFullScreen(enter_fullscreen);
  }
  UpdateHtmlApiFullscreen(enter_fullscreen);
  native_fullscreen_ = false;
}
void WebContents::UpdateHtmlApiFullscreen(bool fullscreen) {