### 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
const base::FilePath& file_system_path) {
  if (!inspectable_ontents_)
    return;
  std::string path = file_system_path.AsUTF8Unsafe();
  storage::IsolatedContext::GetInstance()->RevokeFileSystemByPath(
      file_system_path);
  auto* pref_service = GetPrefService(GetDevToolsWebContents());
  DictionaryPrefUpdate update(pref_service, prefs::kDevToolsFileSystemPaths);
  update.Get()->RemoveKey(path);
  base::Value file_system_path_value(path);
  inspectable_ontents_->CallClientFunction("DevToolsAPI.fileSystemRemoved",
                                                &file_system_path_value,
                                                nullptr, nullptr);
}
void WebContents::DevToolsIndexPath(