- Electron version: 0.37.5
- Operating system: Windows 10

When calling a window's `webContents.downloadURL(URL)` method if the specified URL returns a 404 the `will-download` event on `webContents.session` does not fire and instead a dialog pops up asking the user to save an html file (the contents of the 404 page).

Is this expected behavior and is there any event I can listen to or some other way to get around this? I'd like to handle the error differently if possible.

Thanks

atom/browser/atom_download_manager_delegate.cc
#include "atom/browser/atom_download_manager_delegate.h"
#include <string>
#include "atom/browser/api/atom_api_download_item.h"
#include "atom/browser/atom_browser_context.h"
#include "atom/browser/native_window.h"
#include "atom/browser/ui/file_dialog.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/prefs/pref_service.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/download_manager.h"
#include "net/base/filename_util.h"
namespace atom {
AtomDownloadManagerDelegate::AtomDownloadManagerDelegate(
    content::DownloadManager* manager)
    : download_manager_(manager),
      weak_ptr_factory_(this) {}
AtomDownloadManagerDelegate::~AtomDownloadManagerDelegate() {