wxt-8.x-3.011/modules/custom/wxt_ext/wxt_ext_media/wxt_ext_media.libraries.yml

browser.styling:
  css:
    component:
      css/browser.css:
        minified: true
  js:
    '//cdn.jsdelivr.net/npm/underscore@1.13.6/underscore-umd.min.js': { minified: true, remote: true }
    '//cdn.jsdelivr.net/npm/backbone@1.4.1/backbone-min.js': { minified: true, remote: true }
    js/browser.js: { }
  dependencies:
    - core/drupal
    - core/jquery