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
content::RenderFrameHost* render_frame_host,
    content::BrowserContext* browser_context,
    content::SiteInstance* current_instance,
    const GURL& url) {
  if (url.SchemeIs(url::kJavaScriptScheme))
    
    return false;
  int process_id = current_instance->GetProcess()->GetID();
  if (!IsRendererSandboxed(process_id)) {
    if (!RendererUsesNativeWindowOpen(process_id)) {
      
      
      return true;
    }
    auto* web_contents =
        content::WebContents::FromRenderFrameHost(render_frame_host);
    if (!ChildWebContentsTracker::FromWebContents(web_contents)) {
      
      
      
      
      return true;
    }
  }
  
  auto src_url = current_instance->GetSiteURL();
  return !IsSameWebSite(browser_context, src_url, url);
}
void AtomBrowserClient::AddProcessPreferences(