Here's a little script I use occasionally, it forces the browser to download all hidden files, and to display them all:

  document.querySelectorAll('.js-file-title').forEach(t => t.click());
  document.querySelectorAll('.diff-content').forEach(d => d.style.display="block");
  document.querySelectorAll('.nothing-here-block').forEach(d => d.style.display="none");