STR:
  - Go to https://mozilla.github.io/pdf.js/web/viewer.html
  - Click on "Open File" and open a pdf

The `Download` button and the `Current view` one just disappear.
I can reproduce this bug with Firefox nightly, Chrome stable and Epiphany on debian.
setZoomDisabledTimeout();
  }
}
function webViewerTouchStart(evt) {
  if (evt.touches.length > 1) {
    
    
    
    
    
    
    
    
    evt.preventDefault();
  }
}
function webViewerClick(evt) {
  if (!PDFViewerApplication.secondaryToolbar.isOpen) {
    return;
  }
  const appConfig = PDFViewerApplication.appConfig;
  if (
    PDFViewerApplication.pdfViewer.containsElement(evt.target) ||
    (appConfig.toolbar.container.contains(evt.target) &&
      evt.target !== appConfig.secondaryToolbar.toggleButton)
  ) {
    PDFViewerApplication.secondaryToolbar.close();
  }
}
function webViewerKeyDown(evt) {