Chrome has default font fallbacks set up on a per-script, per-OS basis. See for example https://chromium.googlesource.com/chromium/src/+/master/chrome/app/resources/locale_settings_mac.grd#160, which is the default font for characters in the Japanese-language script.

Electron does not set up these font fallbacks, and as a result, font rendering in those scripts does not match that of Chrome. Further, it's impossible to set it up on the app side to use the appropriate font fallbacks, because of #15480.
atom/browser/atom_browser_client.cc
const GURL& src_url,
                   const GURL& dest_url) {
  return content::SiteInstance::IsSameWebSite(browser_context, src_url,
                                              dest_url) ||
         
         
         
         content::SiteInstance::GetSiteForURL(browser_context, dest_url) ==
             src_url;
}
AtomBrowserClient* g_browser_client = nullptr;
base::LazyInstance<std::string>::DestructorAtExit
    g_io_thread_application_locale = LAZY_INSTANCE_INITIALIZER;
base::NoDestructor<std::string> g_application_locale;
void SetApplicationLocaleOnIOThread(const std::string& locale) {
  DCHECK_CURRENTLY_ON(BrowserThread::IO);
  g_io_thread_application_locale.Get() = locale;
}
}  
void AtomBrowserClient::SuppressRendererProcessRestartForOnce() {
  g_suppress_renderer_process_restart = true;
}
void AtomBrowserClient::SetCustomServiceWorkerSchemes(
    const std::vector<std::string>& schemes) {
  *g_custom_service_worker_schemes = base::JoinString(schemes, ",");
}
AtomBrowserClient* AtomBrowserClient::Get() {
  return g_browser_client;
}
void AtomBrowserClient::SetApplicationLocale(const std::string& locale) {