From HAR to a list of copyable files

har_export.js

// If your browser supports window.performance (at least Chrome does) use this:
window.performance.getEntries().forEach(function(resource) { console.log(resource.name); });

// Other way:

// First 'Copy all as HAR' from Network panel.
// Expose result as 'window.HAR'

console.clear();

if(HAR) {
  var entries = '';
  var body = document.querySelector('body');
  var url = '';
  body.innerHTML = '';
  
  HAR.log.entries.forEach(function(obj) {
    url = obj.request.url;
    console.log(url);
    entries += url + '<br />';
  });
  body.innerHTML = entries;
} else {
  console.log('HAR not defined.');
}

From HAR to list of files, extracted from the HAR.

From this:

To this (a copyable list):