### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/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 feature request that matches the one I want to file, without success.

### Problem Description

We need to load a custom error page when the certificate is invalid but without "isMainFrame" property we don't know when to load the custom error page using webContents.loadURL()

### Proposed Solution

webContents.on("certificate-error", ((event, url, error, certificate, callback, isMainFrame)

### Alternatives Considered

Not sure

### Additional Information

Not sure
shell/browser/api/electron_api_app.cc
if (Browser::Get()->is_ready()) {
    thrower.ThrowError(
        "app.disableHardwareAcceleration() can only be called "
        "before app is ready");
    return;
  }
  if (content::GpuDataManager::Initialized()) {
    content::GpuDataManager::GetInstance()->DisableHardwareAcceleration();
  } else {
    disable_hw_acceleration_ = true;
  }
}
void App::DisableDomainBlockingFor3DAPIs(gin_helper::ErrorThrower thrower) {
  if (Browser::Get()->is_ready()) {
    thrower.ThrowError(
        "app.disableDomainBlockingFor3DAPIs() can only be called "
        "before app is ready");
    return;
  }
  if (content::GpuDataManager::Initialized()) {
    content::GpuDataManagerImpl::GetInstance()
        ->DisableDomainBlockingFor3DAPIsForTesting();
  } else {
    disable_domain_blocking_for_3DAPIs_ = true;
  }
}
bool App::IsAccessibilitySupportEnabled() {